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be engaged in on a budget in cash a credit card for the first time in advance pick up keep in touch fall asleep |
I first saw a crayfish (小龙虾) around 2001. A friend brought one into the office and told me it was a female animal that was reproducing (繁殖) on its own. We realized the new type of animal was reproducing itself by the millions.
We think that in the 1990s, two crayfish got children either in a pet store or in the wild. Something went wrong and one of the daughters laid eggs without any males. It's not unusual for such a sudden change like this to happen, but normally, the children can't live on or reproduce, and the new type won't spread. For some reason, this daughter and her children did.
In some way, many of the new crayfish appeared in German pet stores. They would naturally increase, and their owners would often set the children free, which let the animals reproduce and spread farther. In 2003, scientists officially proved that animals like crayfish were, in fact, reproducing themselves. They've gone from that single female 25 years ago to millions, or maybe billions, of the same crayfish found throughout Europe and Madagascar.
In 2018, we published a map of the clones' genetic code (克隆类遗传密码图). This type is becoming a really useful tool for researchers like me: We can use crayfish-like animals to study everything from cancer development to the effects of drugs on the brain. Now that we know this code, we can start to try it in the lab. For example, we might try to make these animals grow to larger sizes so people can sell them for food. This is already happening in Madagascar. It turns out that crayfish are pretty tasty. It's easy to get lots of them too because they grow up in about three months and lay hundreds of eggs. Just put one in a pool and wait.
① diet ② medicine ③ brain ④ ocean
On some Swedish trains, passengers carry their e-tickets in their hands. About 3,000 Swedes have chosen to put microchips (微芯片) beneath the skin between fingers. The chips, which cost around $150, can hold personal facts, credit-card numbers and medical records. They depend on Radio Frequency ID (RFID), a technology already used in payment cards, tickets and passports.
There are 10,000 people with chip implants(植入) around the world. Sweden, home to several microchip companies, has the largest share. People can order do-it-yourself kits. And sometimes they get T-shirts that say "I got chipped".
Jowan Österlund, the founder of BioHax, a Swedish firm, argues that chips are safer than mobile phones because it is harder to steal information from them. But some people still have worries. RFID chips do not have GPS, but they leave a trail when they are used to open doors, operate printers, etc. In 2004 a Mexican government official and his workmates had chips placed in their arms that tracked who had accessed important information.
So why take the risk? Less trouble is one reason. The equipment for microchip implants exists wherever new payments are accepted. Sweden is well suited, as the world's second most cash-less country (after Canada).
But the chips have little use unless all companies agree to work together. Few shops recognize this chip implants yet, even those organizations that do have had some troubles in the beginning. When Swedish rail officials began scanning passengers' microchips, they saw private information rather than evidence of ticket buying. For now the chips are used largely as business cards, keys or to store important information.
So the desire to win notice or admiration is another explanation. Chip enthusiasts want to equip human bodies with technology. Elon Musk, an American businessman has spent money on this technology that connects machines with human brains, which caused fears from some Christians.
For some people, walking or running outdoors is a great way to exercise. What may not be so great is seeing rubbish all over the ground. Well, some people are doing something about it. "Plogging" began in Sweden. The name connects the Swedish word "plocka," which means to pick up, and the word "jogging," which means to run slowly.
A Swedish man named Erik Ahlström, started the movement in 2016. He moved to Stockholm from a small community (社区) in northern Sweden. Each day he would ride his bike to work. He became worried about the amount of rubbish and litter he saw each day on his way to work. So, he took matters into his own hands. He began picking up the rubbish.
Today, plogging is an official activity, which is becoming more and more popular. People of all ages are welcome to plog. Exercise while helping your community. It can also build closer social connections in a community. When the street looks bad and it's dirty, you're going to feel bad about the community. You may even feel less safe because of that. So if we're all doing our part and picking it up, it's very easy to help beautify it, and help build those social connection. You get to feel some social duty when you do this.
Along with cleaning up the environment, there may be another reason to choose plogging instead of just jogging. You may get a better workout. One fitness app, Lifesum, records one hour of plogging as burning 288 calories.
As can be seen, cities around the world now hold plogging events. The goal is to spread the idea that littering is not acceptable. People would think twice before dropping a garbage on the ground.
A. Plogging is equal parts of exercise and community service.
B. And that is how plogging was born!
C. And plogging does good to your health.
D. Usual jogging burns about 235 calories.
E. They are plogging!
F. There are people all around the world doing this.
G. You get to know your neighbors.
Sure, it's good to get along with your teacher it makes the time you spend in the classroom more pleasant. And because, in general, it's smart to learn how to approach different (type) of people you'll meet throughout your life.
But really, there's one super-important reason you should do it. Kids who get along with their teachers not only learn more, but they're (comfortable)in asking questions and getting more help. This makes easier to understand new materials and do your best on tests.
As a kid in elementary or middle school, you're at a wonderful stage in your life. You're like a sponge (海绵), able to take in lots of new and (excite) information. Besides, you're able to think about all these information new ways.
In most cases, your teacher is happy to be the person who's giving you all materials and (help) you put them together. Remember, teachers are people, too. They feel great if you're open to what they're teaching you. That's why they (want) to be teachers when they were in school—to teach! So some kids should learn to get along with teachers, whether you like the teacher or not.
