1四、阅读理解Have you ever wondered why we need so much sleep? Humans spend about one-third oftheir lives sleeping. We could use this time to do other things, like looking after our familiesand working. Some scientists believe sleeping helps recharge(再充电) the body. But now astudy shows...
Sleeping helps our body as well as our brain . When we are awake . we use energy Body cells get worn down . When we sleep , new cells grow . Sleep help skeep the body from wearing down. For this reason , sleep is important to athletes . Durin...
Now, when you do the sums, though, it doesn't really pan out. If you compare an individual who has slept at night, or stayed awake and hasn't moved very much, the energy saving of sleeping is about 110 calories a night. Now, that's the equivalent of a hot dog bun. Now, I wou...
People don't need to sleep quite so long, 2 our sleep is important, too. We need sleep to keep us 3.You_4 the day learning at school and playing, and at night your body and brain (脑)get to 5, right? Wrong! In fact, when you are sleeping, your body and brain are ver busy...
Indeed, we1onto our sense of fun right into adulthood. So why do human beings spend so much time playing? One reason is that we have time for leisure; animals have very little time to play as most of their life is spent sleeping and2food. So, is play just an ...
No one knows why we sleep, but it’s certain that we need to. People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly, and they fall asleep during the working hours; some may have hallucinations(幻觉).?There are no rules about s...
If you notice any of the signs we discussed, it might be time to assess your pup’s sleep routine. Here are four potential causes to investigate if you notice your dog sleeping poorly. 1. Discomfort Like their human counterparts, discomfort can prevent dogs from sleeping through the night. ...
the adult world. We are, as a population, sleeping less now than we ever have. The problem, on the whole, isn’t that we’re waking up earlier. Much of the change has to do with when we choose to go to bed—and with how we ...
Are you a sleepwalker? Or,is there a sleepwalker around you?(5)It's not just people that love to snooze (打盹). In fact, many animals have unusual or surprising sleeping habits. Some animals, such as bears and hedgehogs, sleep all through winter. The swift is a very fast bird that ...
How Much Sleep Do I Need? The Importance of Slumber Characteristics of Sleep We all know how sleep looks — when we see someone sleeping, we recognize the following characteristics: The person will lie down to go to sleep, if possible. The person's eyes are closed. The person doesn't...