Twenty Nepali climbers are setting off to Qomolangma this week to try and remove decades-old garbage from the mountain in the world's highest ever clean-up campaign, organizers said on Monday。

一项在世界海拔最高的地方开展的“大扫除”活动日前启动。 据活动组织者本周一介绍，20名尼泊尔登山者将于本周启程前往珠穆朗玛峰，清理被丢弃在这里长达数十年的垃圾。

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Ever since I removed those collages, I realized that I actually prefer to see clean, uncluttered walls.

自从我拿掉那些拼贴画后，我才发现自己实际上更喜欢看到干净、整洁的墙壁。

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Have you ever used newspapers when you clean the windows?

你在清洁窗子的时候曾用过报纸吗？

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"I felt good and all washed clean of sin for the first time I had ever felt.

VOA: special.2010.03.21

Do hotels ever clean their key cards and if so how?

FORBES: How Lenient Are Hotels When It Comes To Checking Out Late?

Meanwhile, the global market is demanding ever more clean diesel fuels and low-sulphur petrol.

ECONOMIST: Can anything cool the oil market?

Armstrong said no generation was ever "clean, " and the best way forward is a truth and reconciliation process offering amnesty to riders and officials who detail doping in the sport.

NPR: Armstrong: Truth & Reconciliation Is 'Only Way'