Someone would have to clean the snow off the sidewalk, either him or his father.

VOA: special.2009.03.07

Why didn't he come clean? Of course, they took "The Purloined Ribbon" to be his sort of allegorical way of suggesting that he couldn't possibly confess because nobody can confess, there's no human subjectivity, etc., etc., etc.

为什么不全盘招供，当然，人们把他写的“偷窃的缎带“当成他用一种讽喻的方式,来暗示说他不可能承认,因为没有人能承认，人类主观性的缺失，等等等等。

耶鲁公开课 - 文学理论导论课程节选

This can help a worker keep his nose clean or stay out of trouble.

VOA: special.2009.09.13

His clothes were too small for him, but they were clean.

VOA: special.2009.04.04

"It is his anticipation that the Afghans are going to come to expect more from their government,expect clean and competent leadership from their government,"

VOA: standard.2009.11.12

The Maldivian leader wants countries like his to embrace green technology, switch to clean energy, and show the way to those who are opposed to change.

VOA: standard.2009.11.09

The Indian leader announced Monday that the United States and India would sign a memorandum of understanding during his visit designed to improve cooperation on energy security, clean energy and climate change.

VOA: standard.2009.11.25

A White House spokesman says the president will talk to the nation about what his administration has done to help clean up the oil, limit the environmental damage and direct BP to stop the leak.

VOA: standard.2010.06.15

Earlier Friday, BP's incoming CEO Bob Dudley, said it is time to scale down the vast operation to clean up the Gulf of Mexico oil spill, but he stressed his company's commitment to fully restore the environment.

VOA: standard.2010.07.31