Perhaps most interesting, and most easily measured, is a chemical change in ground water before a quake.

也许最有趣、也最容易测量，是地震前地下水发生化学变化。

A strong blow to the head causes chemical changes within nerve cells that damage their structural proteins.

头部遭受猛烈撞击会使得神经细胞发生化学变化，进而造成结构蛋白损伤。

An fMRI can identify chemical and other changes resulting from blood flow.

功能性磁共振成像技术可以识别出血液流动造成化学变化和其他变化。

This suggests that the self-stiffening is not the result of chemical changes in the polymer, which can usually be undone by heat.

这说明材料强度提高并不是聚物发生化学反应造成，一般这种变化在加热状态下是可逆。

Increasing your heart and breathing rate is linked to chemical changes in your brain that help reduce anxiety and increase your sense of well-being.

另一项很有用工具就是运动。增加你心跳率和呼吸率会造成你大脑中产生化学改变，

Ruefenacht said his near death experience made him wonder if dogs could be trained to identify the chemical changes that happen during an attack, and then inform their owners.

鲁芬纳克特表示，那次濒死经历让他好奇狗是否也可以接受训练，识别发病期间任何化学变化，然后告知主人。

When a rat gets infected by eating cat feces, the parasite changes chemical levels in the rat's brain, making it less cautious around the hungry felines, maybe even attracted to them.

当老鼠吃猫屎被感染，这种寄生虫会 改变鼠脑化学平衡，使牠们对於饥饿猫 更不知危险，甚至使老鼠想接近猫。

Now what we believe happens is that the nerve cells in the brain, as a result of this force being applied, are stretched, and there's then a release of chemicals that changes the way that the brain works.

如今我们认为，大脑中神经细胞在外力施加时被拉伸了，之后释放化学物质改变了大脑工作方式。