严密

yánmì

tight; strict; closely controlled; rigorous and thorough

HSK 7-9

Pronunciation

yánmì

这个密封盖必须扣得严密，才能防止气体泄漏。

Zhège mìfēng gài bìxū kòu de yánmì, cáinéng fángzhǐ qìtǐ xièlòu.

This seal cap must be fastened tightly to prevent gas leakage.

One fixed sample

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