I missed four chemistry classes.
我旷了四节化学课。
I've missed four chemistry classes.
我是旷了四节化学课。
As a comprehensive course of practice, exploratory study is an enrichment to and expansion of itself in chemistry classes.
研究性学习属于综合实践课程，在化学课堂教学中开展探究学习是对研究性学习内涵的补充和外延的拓展。
The article introduces what is"target teaching method"and what is its process and result when it is put into practice in chemistry classes.
本文介绍了什么是“目标教学法”以及它在化学课堂上的实施过程和结果。
It smoothly curls between the existing main building and is connected by the atrium, the auditorium and on the upper level the biology, physics and chemistry classes.
它温顺地蜷缩在旧建筑之间，与天庭，礼堂，和上层的生物，物理和化学教室相连。
This handbook covers the major classes of polymeric foams and discusses their chemistry, properties, preparation methods including commercial processes, and applications.
这本手册涵盖了聚合物泡沫的主要类别，并讨论它们的化学性质，制备方法，包括商业流程和应用程序。
We have many of our chemistry and biology classes in it.
我们很多化学课和生物课都在那里上。
We have many of our chemistry and biology classes in it.
我们有很多我们的化学和生物学的课程。
The school has physics, the chemistry two laboratories, well appointed, may supply two classes the student simultaneously does the experiment.
学校配有物理、化学二座实验室，设备齐全，可供二个班的学生同时做实验。
He has made his classes so lively that we all like to learn chemistry.
他的课是如此生动以至我们都爱学化学。
And even if you are a chemistry major, you will still need to take classes in subjects like history and sociology.
即便你学的专业是化学，你仍需选上一些历史学、社会学课程。
If you are a high school student and you are interested in becoming a pharmacist here are four classes you should take: Science, chemistry, math, and a foreign language.
如果你是一位高中学生，你有兴趣成为药剂师这里有4个班你应该采纳：科学，化学，数学，外语。
I had had a few classes that morning, and had found myself severely unprepared to talk about subjects like history and chemistry in Chinese.
上午的课程很少，在历史，或是化学课上需要用中文讨论，我发现我对此毫无准备，非常尴尬。
I had had a few classes that morning, and had found myself severely unprepared to talk about subjects like history and chemistry in Chinese.
上午的课程很少，在历史，或是化学课上需要用中文讨论，我发现我对此毫无准备，非常尴尬。
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