put on穿上 Please put on your shirt !请穿上你的衬衫 !
put off 脱下 don’t put off your clothes ! 不要脱掉你的衣服 !
human being 人类 Human beings have exited for millions !人类已经存在了亿万年.
in danger 有危险 Be careful ,you are in danger ! 小心,你有危险了 !