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If something is sufficient for a particular purpose, there is enough of it for the purpose.
enough
insufficient
One yard of fabric is sufficient to cover the exterior of an 18-in-diameter hatbox.
一码布足够罩住直径为18英寸的帽盒的外部。
Lighting levels should be sufficient for photography without flash.
照明应达到不开闪光灯可以拍照的亮度。
There was not sufficient evidence to secure a conviction.
证据不充分，不足以定罪。
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