Watch out! Don't play with that thing危险，别淘气

几个句子是有关教诲、告诫的：1.Don't leave things half done. 你别半途而废。2.I'm ready to throw in the towel. 我认输了。3.It's your responsibility. 这是你分内的工作。4.(It's) better safe than sorry. 保得安全总比后悔好。