At this time, it is important to remember a quick lesson in chemistry.
在这个时候，快速地记住在化学中的一些教训就很重要了。
Mr Aldersey-Williams bemoans the decline of classroom chemistry, and the rise of a culture in which experiments performed by teachers must be timed to coincide with the length of the lesson.
奥尔德-威廉姆斯[color=#0000ff]抱怨化学教学的倾斜以及一种文化的[color=#0000ff]兴起。在这种文化中教师[color=#0000ff]做实验[color=#0000ff]的时间必须配合一节课的长度。
This was my first lesson in chemistry and I never forgot it.
这就是我第一节化学课，并且我从没有忘记它。
How to make use of the environmental protection education in the experiment teaching in, put in the chemistry educator in front of a deserve deep into study of lesson.
如何寓环境保护教育于实验教学之中，是摆在化学教育工作者面前的一个值得深入探讨的课题。
In our country's secondary medicine education, chemistry is an important basic lesson.
化学在我国中等医学教育中是一门重要的文化基础课。
We have chemistry at half past eleven. We don't have science today In the afternoon, I have art at half past one and I have an English lesson at half past two. What about you, Betty?
十一点半我们上化学。今天下午我们没有自然科学。一点半我要上美术，两点半上英语。贝蒂，你们的课程是什么呢？
We have chemistry at half past eleven. We don't have science today In the afternoon, I have art at half past one and I have an English lesson at half past two. What about you, Betty?
十一点半我们上化学。今天下午我们没有自然科学。一点半我要上美术，两点半上英语。贝蒂，你们的课程是什么呢？
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