perplexing

1.they were perplexing a subject plain in itself.

他们正在使身简单问题复杂化。

2.This might seem very perplexing to those who know nothing about it.

这对那些对它无所知人来说可能显得很难理解。

3.Long-term since, drinking water is perplexing us filthily.

长期以来,饮用水不洁困扰着我们。