Active vitamin D then goes on to cause the gastrointestinal tract to increase calcium absorption.

活性维生D作用于消化道，增加钙的吸收。

You're right. It only works against bacteria with proteins that are sensitive to penicillin.

没错。它只能作用于对青霉敏感的，含有蛋白质的细菌。

One poison acts on the nerves, the other on the blood.

一种毒液作用于神经，另一种毒液作用于血液。

Like an unbelievable earthquake, probably everywhere on Earth for an object that large.

如此难以置信的大地震将作用于整个地球。

In tracking a touch or gesture, the wall functions similarly to a smartphone screen.

在追踪触碰或手方面，这面墙的作用类似于智能手机屏幕。

They're trying to play with the biology of photosynthesis itself.

她们想要玩弄生物的光合作用于股掌之中。

Gravity is pulling everything, everything I can see, down to the ground.

重力作用于世间万物，我所看到的一切都受到它的牵引，要落向地面。

These walls were meant to protect China from invasion.

这墙作用于保护中国免受入侵。

Other pesticides only affect the part of the plant upon which they are applied.

其他杀虫剂只作用于被施药的那部分植物。

Gerunds work like nouns in sentences but are formed by placing the ing-ending on verbs.

名词在句子中的作用类似于名词，但它是通过将 ing 放在词结尾构成的。

In these verbs, the subject's action is not applied to an object.

在这些词中，主语的作并不作用于宾语。

Any thought or emotion is bound to directly affect the physical body.

无论如何，你们必须清楚地理解，思想和情绪本身是现实，直接作用于身体机制。任何想法和情绪，必然直接影响身体。

Would these laws ever just apply to companies directly?

这些法律是否只作用于公司？

So, how can laws designed for countries affect companies?

以国家为基础设计的法律如何作用于公司？

But the garden became much more.

但是它的作用已经不止于此了。

Here on Earth, there are some forces working on objects all the time.

在地球上，有一些力始终作用于物体。

Gerunds are formed from verbs, but they work like a noun in a sentence.

名词由词构成，但它们在句子中的作用类似于名词。

One is that there are other forces that are acting on the ecosystem at the same time.

“其一，有其他力量在同时作用于生态系统。

ADH affects the last two-thirds of these tubes, called the distal convoluted tubule and the collecting ducts.

ADH作用于这些小管的终末2/3部分，即远曲小管和集合管。

They are devoted to different parts of the body: the heart, nervous system, stomach.

它们作用于身体的不同部位：心脏、神经系统、胃。