Clean the mussels and discard any that do not close.

清洗这些蚌，并且丢掉任何合不上的。

《柯林斯英汉双解大词典》

But in general, get in close, shoot tight, and keep your backgrounds clean.

但是一般来说，要靠的近一点，拍的紧凑些，让背景更干净。

youdao

If you have the grain going the wrong way the paper will ripple, the fold will not be clean and the book will want to close itself.

如果把纸的纹路弄反了，纸就会起皱，折边也不整齐，书还总是会自己合上。

youdao

To ensure patients' safety I want a regulator with the power to close, clean and then re-open wards if necessary.

BBC: NEWS | UK | UK Politics | Alan Johnson's speech in full

If that's the case it could save the dozens of small coal plants that now look sure to close as clean air rules tighten over the next several years.

FORBES: Page 2 of 2

The innings was brought to a close when Lara was clean-bowled attempting to slog Nel mid-way through the evening session.

BBC: Brian Lara 177 innings (1989-2003)