This is so some water can drain out.

这样一些水就能来。

For a start, all animals, such as cows, pigs and sheep, always gas limed methane, which is the second most common green house gas after carbon dioxide.

先，所有动物如牛、猪、羊都会甲烷气体，它是在二氧化碳之后第二大常见温室效应气体。

Exhaust gases escape through ports in the cylinder walls.

而废气通过汽缸壁接口。

A number of other people were injured, three of them critically. Liquid nitrogen is used in refrigeration, but it can vaporize and force the breathable air out of enclosed spaces.

另有多人受伤，其中三人伤势严重。液氮用于制冷，但它会蒸发，在封闭空间中会将可呼吸空气。

They positioned windows to draw on prevailing breezes and dotted clever features like transom windows above interior doors, which could be cranked open to let stuffy air escape while the door stayed shut for privacy.

他们顺应盛行风向规划开窗位置，还在内门上方增设气窗这类巧设计，房门关闭保证私密性同时，可旋开气窗闷浊热气。

And those massive amounts of particles can cause clouds to form.

巨量微粒便会形成云朵。

Synthetic materials charge static electricity, but flax discharges it.

合成材料会产生静电，但亚麻却能将其。

It was therefore necessary to have sections of the line that weren't enclosed, out in the open air, to allow for proper ventilation.

也因此，在途中留有未封闭开放空间是很重要，这样才能将气体适当。

Give it a good tap to get the air bubbles out.

用力敲击以空气泡。

It sweats, passing salty water called sweat through the skin to lose heat.

它会汗，通过皮肤一种叫做汗液咸水来散热。

And all the fumes that come out of the cars, they can cause respiratory problems, people end up in hospital with heart disease and it's, it's really negative. It has a really detrimental effect on us.

汽车里废气会导致呼吸系统问题，人们最终会因心脏病住院，这是一种负面影响。它对我们有非常有害影响。

The main job of the gastrointestinal system is ingestion - taking in food, digestion - breaking it down into nutrients, absorption - pulling these nutrients into the bloodstream, and finally, excretion - getting rid of waste.

消化道有四大功能：一是进食，即摄入食物；二是消化，将食物分解成营养成分；三是吸收，即把营养成分吸收入血液；四是遗，即不能消化吸收废物。

He found that it came from the river polluted by the dirty water from London.

他发现，水是从河里来，而河水被伦敦脏水污染了。

One of the reasons cats like cardboard boxes so much is because cardboard is insulating, and helps cats not need to expel any additional energy to maintain their body temperature.

猫咪非常喜欢纸箱原因之一就是因为纸板隔热，可以让猫咪不需要额外热量来维持自身体温。

During pregnancy, a woman's body may not expel liquids like it should.

在怀孕期间，女性身体可能不会像它应该那样液体。

So they wrapped these twins in foil, this is, believe it or not, how you get body odors out so they could look at the body odors, and they could measure them.

所以科学家们用铝箔把这对双胞胎裹了起来，信不信由你，这样才能让人体异味，既能看到效果，又能对其进行分析测量。

On average, each of these plants disposes of 1,300 litres of waste-water per day.

每个这些工厂平均每天会1300升废水。

The fish are injected with a hormone that triggers their urge to release eggs.

工作人员会给鲟鱼注射激素，促使鱼卵自然。

When Archimedes climbed in and out of the bath, he carefully studied the displaced water.

当阿基米德在浴缸爬进爬，他仔细研究了水。

If I'm climbing and I need to initiate a descent, I need to vent helium.

如果正在上升，下降时候我需要氦气。