n.
1.化學
2.化學性質，化學反應，化學現象；化學過程
3.（彼此間的）關系
例句：
1.He is mugging up on his chemistry for the final examination.
為了應付期末考試，他正在拼命突擊化學。
2.Our chemistry teacher rears all kinds of birds.
我們的化學老師養著各種鳥。
3. We have literally altered the chemistry of our planet's atmosphere.
我們實際上改變了地球大氣層的化學成分。
4.Their chemistry was wrong from the beginning -- they hated each other.
他們的關系從壹開始就不好——他們彼此厭惡。