to shut
key
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→guan1jian4 • guānjiàn
crucial
crucial point, critical, critical point, key, crux
他 掌握 了 關鍵 的 資源。
He controls crucial resources.
這 是 關鍵 的 問題。
This is a crucial issue.
關鍵 時刻 快 到 了。
The crucial moment is approaching.