证人提供了可疑的证据，后来在法庭上被推翻。

The witness provided ___dubious evidence that was later discredited in court.

他是个名声可疑的人，所以很多人不愿与他做生意。

He is a man with a ___dubious reputation, so many are reluctant to do business with him.

考虑到围绕该公司相当可疑的情况，其突然的成功令人侧目。

The company's sudden success raised eyebrows, given the rather ___dubious circumstances surrounding it.