帮用英语翻译一下：“没把握的事不做,不确定的话不说”

don't do something you are not good at, don't say something you are not sure.

without sure without do;

unless you sure it,you do it.

献丑了

Don't do the uncertain things or say the uncertain words.

Never do what you are not capable of ；
Never say what you are not sure of.

Do and say what you are sure of.

be sure of sth 能确定的，有把握的。