彼らはこのものを理解できるほど賢くない。の英語

They aren't smart enough to understand this stuff.

They surely cannot understand each other.

He is so wise that he can not but see that

He is too wise not to see that.

They may not know anything about this.

A word to the wise is enough.

A wise man would not do such a thing.

However they haven't acknowledged this matter.

Great minds think alike.

A wise man would not say such a thing.

He is too wise not to know that.

Some are wise and some are otherwise.

They have not the courage to speak

They dare not speak.

Nobody could be that clever.

“A word to the wise is sufficient.”【イディオム・格言的】

He is smart so he doesn't do stupid things.

He talks like a man of sense, but his actions are those of a fool.

They may not know about it.

They won't know about that.

They don't think kindly of that.

too clever to be sound

He's too smart to do something that stupid.

He is more crafty than wise.

That was a smart move.

His words are those of a man of sense, but his actions are those of a fool.

He surely is not wise.

He is too smart not to know it.

I am not very good at those.

He is more clever than wise.