So some people doubt whether the inventor came up with the idea himself or herself.

所以有些人怀疑发明者是否自己想出了这个主意。

I doubt whether it'll work.

我怀疑这是否行得通。

I doubt whether he dose not like this book.

我怀疑他是否不喜欢这本书。

There is some doubt whether John will come.

约翰是否会来很难说。

They doubt whether or not Jack is a good student.

他们怀疑Jack是否是一个好学生。

I doubt whether Jack could manage a sailing boat.

我怀疑杰克会不会驾驶帆船。 。

Some scientists doubt whether there is the sixth sense.

有些科学家怀疑是否有第六感觉的存在。

But I doubt whether afforestation alone will solve the problem.

但我对仅仅植树造林就能解决问题表示怀疑.

It can make you doubt whether you even have a self.

它甚至会让你怀疑自己是否是一个个体。

I have small doubt whether he is suitable for the job.

他能否合适这件任务我有点疑心。