He wanted to ask her what had happened, but knew better.

他想问问她发生了什么，不过知道更好些。

youdao

The sheriff knew better, but he supported me anyway.

但治安官比他们更了解实情，不管怎么说，他还是支持了我。

youdao

He knew that protectionism makes people poorer; but given the number of steel mills in swing states, he thought he'd better protect them anyway.

他知道保护主义会让民众更穷；但若已知那些摇摆州的炼钢厂数量，他认为无论如何，最好还是保护他们。

youdao

Often he had really wanted to get rough, he said, but he knew better.

ECONOMIST: Jim Clark

Craig Malloy, then a director of marketing, was convinced he could sell thousands of inexpensive systems, but he knew better than to try to change the minds of his superiors.

FORBES: Up & Comers: Told ya so

One of the savviest government securities dealers on Wall Street admits he knew better but, on a friend's tip, invested in a bogus penny stock traded on the Vancouver Stock Exchange.

FORBES: Magazine Article