When they cleaned up the painting they discovered a Holbein underneath.

他们擦这幅画时发现下面有一幅霍尔拜因的作品。

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The remaining 423 students merely cleaned their teeth when they went to bed and when they got up in the morning.

剩下的423名学生只在上床睡觉和早上起床的时候刷牙。

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Soft and weak references can be cleaned up when they are no longer referenced.

Soft 和 weak 引用在引用不复存在时可被清除。

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When the targeted area was cleaned up Thursday morning and the first truck was loaded, village children suggested they take more bags into other neighborhoods.

VOA: standard.2010.04.01

When she was done, everyone sang together as they cleaned up the room to prepare for the next activity.

FORBES: The Right Way to Speak to Yourself