You must know the lab rules before the first lab lessons.
在上第一堂实验课之前，你必须了解实验规则。
The work in your lab has produced some general rules of attractive faces. What are they?
你们实验室的工作揭示了一些关于相貌有吸引力的一般规律。这些规律是什么呢？
There are rules and regulations on how you can iterate whether it be in a lab or in pre-clinical or in clinical practice.
怎样在实验室，临床实验或者临床实践上反复，都是有规范的。
Weshould follow the rules of the lab when we are doing experiments.
我们做实验时，就要遵守实验室的规则。
The safety rules for the science lab are based on long experience, and if you transgress them, you may have to pay a heavy price.
科学实验室的安全条例是基于长期的经验而制定的，如果违反了条例，可能就要付出沉重的代价。
The safety rules for the science lab are based on long experience, and if you transgress them, you may have to pay a heavy price.
科学实验室的安全条例是基于长期的经验而制定的，如果违反了条例，可能就要付出沉重的代价。
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