We must rack our brains for some answers to his questions.
我们必须绞尽脑汁设法回答他的问题。
Debate is for the ambiguous part of things; therefore, we rack our brains to think and prove it.
而当我们与人辩论，是因为事理尚有未明之处，所以我们才需要绞尽脑汁，去思考、印证。
While our compatriots rack their brains on how to get their 15 minutes of fame, and subsequent fortune, he has been hiding from the spotlight.
在别人绞尽脑汁思考如何在15分钟内名富双收的时候，他却躲在聚光灯之外。
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