not dirty
Please keep the floor clean.
请保持地板清洁。
neat and tidy
Cats keep themselves clean.
猫会保持自己整洁。
safe for the environment
Solar power is a clean energy source.
太阳能是一种清洁能源。
blank
Use a clean piece of paper.
用一张空白的纸。
appropriate for all ages
Tell clean jokes only.
只讲适合所有年龄的笑话。
no law violations
He has a clean record.
他没有违法记录。
free of illegal items
The search showed he was clean.
搜查显示他没有违禁品。
sober
She has been clean for months.
她已经清醒几个月了。
fair
It was a clean match.
这是一场公平的比赛。
smooth and even
Make a clean cut with the knife.
用刀切得平整。
skillful
The pilot made a clean landing.
飞行员熟练地着陆了。
error-free
She writes clean reports.
她写的报告没有错误。
fresh and pleasant
The soap has a clean scent.
这块肥皂有清新的香味。
to make something not dirty
Clean your shoes before entering.
进屋前把鞋弄干净。
to become not dirty
This table cleans easily.
这张桌子容易清洁。
to dry clean
I will clean this suit at the shop.
我会在店里干洗这套西装。
to prepare food by removing insides
Clean the fish before cooking.
烹饪前把鱼清理干净。
completely
I clean forgot to call.
我完全忘了打电话。
the act of cleaning
The car needs a good clean.
这辆车需要好好清洗。