It took years to understand many perplexing diseases.许多疑难病症要耗时数年才能搞明白。

British Parliamentary procedure is perplexing at the best of times.就算在最好的情况下, 英国的议会程序也令人不解。

The rules of cricket are perplexing to most people.大多数人都觉得板球规则很费解。