Luckily, many volunteers from all over the world came to Qomolangma to join in the clean-up activity.

幸运的是，许多来自世界各地的志愿者来到珠穆朗玛峰参加清理活动。

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The summer of 1991, under the leadership by Hotel General Manager Mr. Udo A. Hartung, the hotel was organized the staff to the xiamen beach and conducted clean-up activity.

1991年夏天，在总经理伍多哈通先生的带领下，酒店组织了部分的员工到海边开展了净化海边活动。

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Interruption allows a cancelable activity to clean up any work in progress, restore invariants, notify other activities of the cancellation, and then terminate.

中断允许一个可取消活动来清理正在进行的工作，恢复不变量，通知其他活动它要被取消，然后才终止。

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"But you have to remember that the hurricane generates extra activity too, in terms of the clean-up and rebuilding, " he told the BBC.

BBC: Sandy: Damage estimated at up to $20bn