If you do have it, the disease will always have onset by age 40, 50 or what have you.

如果你有的话，这个病就会从40岁，50岁之类的年纪0,开始发作。

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And if you're not sure what to do, you can always go to club fairs,

如果你不确定该做什么，你可以一直去俱乐部的集会，

阿卡贝拉组合最棒 - SpeakingMax英语口语达人

Always guess before you run your program what you think it's going to do.

当你运行程序之前,总是先想想程序会怎么做。

麻省理工公开课 - 计算机科学及编程导论课程节选

What are you always told to do?

老师是怎么教你呢

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