月亮突然从云层后面出现了。

The moon suddenly appeared from behind the clouds.

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The moon suddenly appeared from behind the clouds.

appeared 是动词 appear 的过去式,appear 由前缀 ap-(表示"朝向")和词根 pear(来自拉丁语 parere,意为"出现")组成,意思是"出现、显现"。

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