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be essential for

对…必不可少的

1、重要

... get back(into)恢复； be essential for重要/基本/实质的； as soon as一---就； ...

2、基本

... get back(into)恢复； be essential for重要/基本/实质的； as soon as一---就； ...

3、对…必不可少的

...essential information[计]基本信息be essential for对…必不可少的essential drugs基本药物 ...

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