他周末呆在家里。
Anyone who keeps learning stays young.
任何持续学习的人，都可以保持年轻。
The standing leg locks so it stays straight.
（马）站立的腿被锁住了，所以它能保持笔直。
Only teak matches oak's expansion coefficient and stays watertight.
只有柚木才能达到橡木的膨胀系数，并保持水密性。
If a person stays in the same room the following night they tend to sleep more soundly.
如果一个人第二晚呆在同一个房间，会睡得更香。
Half of your brain stays alert and prepared for danger when you sleep in a new place, a study has revealed.
一项研究表明，当你在一个陌生的地方睡觉时，你的半边大脑会保持警觉并做好准备防范危险。
The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere's eye stays open and alert.
由睡眠大脑半球控制的眼睛保持关闭，而清醒大脑半球的眼睛保持睁开和警觉。
During diapause, a young kangaroo stays in the female's pouch and growth of a second fertilized egg inside the uterus is delayed.
在滞育期间，小袋鼠呆在雌袋鼠的育儿袋里，因而推迟了子宫内第二个受精卵的发育。
It looks like what's at issue is less how long your food stays on the floor and much more how contaminated with bacteria that patch of floor happens to be.
看起来问题的焦点不太在于你的食物在地上停留的时间长短，而更在于那块地被细菌污染到了什么程度。
It is immaterial to me whether he stays or goes.
他的去留与我无关。
Unlike other trees, it doesn't taper very much. It stays fat all the way up.
不像其他树，它不是越往上越细，而是自下往上一样粗。
The mother stays more time in the nest.
母亲在巢中停留的时间更长。
The box stays here, but it belonged to you.
盒子留在这里，但它是属于你的。
Sometimes he stays in an ice house called igloo.
有时他会待在一个叫做 igloo 的冰屋里。
He no longer stays in his room by himself.
他不再一个人呆在房间里了。
Usually, a messenger stays in the position for three years.
通常，信使会在这个职位上待三年。
He hardly stays up late, and he is an early bird.
他很少熬夜，而且是个早起的人。
While the seed is in the animal's body, it stays whole.
当种子在动物体内时，它是完整的。
As winter arrives, you'll notice the darkness stays with us longer.
随着冬天的到来，你会发现黑暗会持续更长时间。
The fridge stays cool, thanks to air from under the ground.
冰箱利用地下空气来保持低温。
Although she likes hanging out with her classmates, she hardly stays out late.
虽然她喜欢和同学闲逛，但她很少在外边待到很晚。
He stays with Andy, even when Andy grows up and goes to college.
即使安迪长大了，上了大学，他还是会和安迪在一起。
Miss Zhou often stays up late. She seldom goes to bed before 11 p.m.
周老师经常熬夜。她很少在晚上11点前睡觉。
We deep fried fish three days ago in the kitchen, but the unpleasant smell stays.
我们三天前在厨房里炸过鱼，那股难闻的味道一直没散。
Imagine that one stays in a cold street because there is no other place to stay.
想象一下，一个人待在冰冷的街道上，因为没有其他地方可以待。
They help both children and adults stay strong during long hospital stays, and, some suggest, even help them get better.
它们帮助小孩和大人在长时间住院期间保持身体健康，有些人表示甚至能帮助他们康复。
Experts think that about 50 percent of open fires are dangerous because chimneys don't work properly and too much smoke stays in the house.
专家认为，约50%的明火是危险的，因为烟囱不能正常运作，有太多烟雾会留在室内。
Steve Sinclair, head of the company, said, "We have to build something that helps you when you need it and stays off when you don't need it."
公司负责人史蒂夫·辛克莱说：“我们必须制造一些东西，在你需要它的时候提供帮助，不需要它的时候则关闭。”
He stays with me through all seasons.
他陪我度过所有季节。
The gilding decays, but hog's leather stays!
镀金会渐渐消失，但猪皮会保留下来！
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