What do you mean you can't say? There's no explanation.

1. can't express words. They are not idioms, or they don't know how to speak or the meaning of rhetoric.

2, there is a self-evident is not an idiom, just a phrase. Speech: speech, speech, language. Nothing: nothing, nothing. Table: surface, expression, indication. If you don't express it, it's a bad expression, a bad expression or a bad word.