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1.precaution 预防措施
例句：But it added that it had quarantined the batch used at the school as a precaution.
但是它补充说，作为预防它隔离了曾在学校使用的这批疫苗。
2.common sense 常识
例句：You would think that making these reforms would be a matter of common sense.
你可能认为做出这样的改革是个常识性的问题。
adj. 泰然自若的，从容的；被控制的 v. 包含；遏制
