The attack was not a natural action for food, but out of response when the two sharks swam too close to the great white.

这一袭击并不是为了争夺食物面进行的自然行为，而是由于两条翅鲨游得太近引起大白鲨的自然回应。

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This natural action of GABA is augmented by benzodiazepines which thus exert an extra (often excessive) inhibitory influence on neurons.

GABA的这个作用被二氮卓类药物强化，因此二氮卓类药物能够使GABA产生额外(通常大量地)抑制信息而影响脑神经细胞们。

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The World Meteorological Organization points to Cuba and Bangladesh as examples of countries that have successfully reduced the loss of life caused by natural disasters by taking preventive action.

世界气象组织用古巴和孟加拉国做例，指出这两国通过采取预防行动成功减少自然灾害造成的生命损失。

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The action of wind and water can form cave openings like natural rooms within the rock.

VOA: special.2009.07.20

An agonist is a substance that mimics the action of a natural ligand, and I show you a couple of examples of agonists here.

激动剂是能够模拟天然配体分子的物质,在这里我给出了一些激动剂作为例子

耶鲁公开课 - 生物医学工程探索课程节选

This would an example of a substance that inhibits the action of a natural ligand and they can inhibit in a variety of ways.

这类物质能够以多种方式,抑制天然配体的作用

耶鲁公开课 - 生物医学工程探索课程节选

Being determined and persistent is a natural action for those that want to win.

FORBES: Do You Exemplify These 5 Fundamental Traits of Successful Business Leaders?

He'll leave a gamey piece of goat in this brew for about five days, allowing natural enzymatic action to tenderize the meat, while the marinade keeps bad bacteria at bay.

WSJ: Get Your Goat On

While wandering the halls of Mobile World Congress, we came across NUIA (Natural User Inter Action), a German company whose software is designed to make it easier for developers to code apps that make use of eye tracking sensors, such as Tobii's.

ENGADGET