calibrate例句

Pesticide levels in food are simply too difficult to calibrate.
食品中杀虫剂的含量很难精确测定。

My watch is faster, and I need calibrate it.
我的表走快了,我得把它校准。

A direct means is required to calibrate the indirect method.
要求用直接测定法校正间接测定法.

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