您要查找的是不是：
- We have three periods of chemistry a week. 我们一星期三节化学课。
- The scientist probed into the secrets of chemistry. 这位科学家探索了化学的种种奥秘。
- Chemistry was her favourite subject at school. 她上学时最喜欢化学。
- Slop out the waste basins first when you get up. 起床的第一件事是把例盆倒了。
- No one can cope with him in Chemistry. 在化学方面，谁也比不上他。
- I am not good at organic chemistry. 我的有机化学学得不好。
- Don't waste time on nonessentials. 不要把时间浪费在枝节事情上。
- We will do a Chemistry experiment this Friday. 这个周五我们要做化学试验。
- It's only a waste of time to speak to her. 和她说话纯粹是浪费时间。
- I can't just let the water run to waste. 我不能让这些水白白流掉。
- It'd be a pity if all this work went to waste. 如果所有这一切工作都白干了，那多可惜。
- He is an authority in the region of chemistry. 他是化学界的权威。
- It is often the case that haste makes waste. 忙中有错是很常见的。
- I have only a rudimentary grasp of chemistry. 我只掌握了化学的初步知识。
- I have lost my interest in chemistry. 我对化学已不感兴趣。
- He was still devoted to the study of chemistry. 他仍专心致力於化学研究。
- It's a waste of money betting on that old nag! 把赌金压在那匹老马上就是白扔钱！
- Physical chemistry is Greek to me. 我对物理化学一窍不通。
- Don't waste time on niggling details. 不要为琐事浪费时间。
