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We must not do that experiment without reading carefully the instructions.
如果没有仔细阅读操作说明，我们决不能做那个实验。
youdao
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Be sure to follow your teacher's instructions while doing an experiment.
做实验时务必按照老师的话去做。
youdao
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Be sure to follow your teacher's instructions while doing an experiment.
做实验时务必按照老师的话去做。
youdao