It's doubtful

怀疑───doubt;令人───cause

That claim is increasingly open to doubt.───那一说法越来越可疑。

There is good reason to doubt this.───有正当理由怀疑这件事。

I doubt whether [ if ] he is at home.───我看他不一定在家.

No doubt it is very absurd.───这无疑是十分荒谬的.

The guilt of the accused man was in doubt.───被告之罪有疑问.

It is a terrible thing to doubt someone you have trusted all your life.───怀疑你信任了一辈子的人是很叫人痛心的事。

I had no doubt that the craven fellow would be only too pleased to back out.───我毫不怀疑那个胆小的家伙巴不得撒手退出呢.

It can no doubt be fairly argued that Sir John, whose pay is linked to performance, is entitled to every penny.───毋庸置疑，既然约翰爵士的薪水是与业绩挂钩的，他的每一分钱都是理所应得的。