perplexing

🇬🇧/pəˈpleksɪŋ/ 🇺🇸/pərˈpleksɪŋ/📚 17444 43托福
If you find something perplexing, you do not understand it or do not know how to deal with it. 令人不解的

adjective [原级]复杂的,令人费解的;令人困惑的

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

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