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1·Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood, it is likely that smoking contributes to depression in teenagers.

由于香烟中的尼古丁会改变大脑的化学性质，从而可能影响情绪，因此吸烟可能会导致青少年抑郁。

2·Your brain chemistry changes.

你的大脑化学物质在变化。

3·I could feel my brain chemistry change.

我能感受到自己脑中的化学变化。

4·Maybe, depending on your brain chemistry.

可能会吧，不过这完全取决于你大脑里的化学过程。

5·How do brain chemistry and structure affect hunger?

大脑的化学物质和结构怎么样影响饥饿感？

6·Each of them is mediated by a distinct condition of brain chemistry.

每个阶段都是由一种独特的脑化学条件传递的。

7·Maybe it's my brain chemistry. Maybe that's what's wrong with me.

或许这只是我大脑的化学反应，或许这就是我不对劲的地方。

8·Exercise promotes sleep and improves sleep quality by altering brain chemistry.

锻炼有助于睡眠，它让大脑产生有益的化学物质改善睡眠。

9·It turns out that antidepressants don't correct imbalanced brain chemistry.

原来，抗抑郁药物没有纠正失衡的大脑化学物质。

10·Our feelings, thoughts and attitudes are influenced by changes in brain chemistry.

我们的情感、想法和态度受发生在大脑内的化学变化影响。