1. This might seem very perplexing to those who know nothing about it.
    这对那些对它一无所知的人来说可能显得很难理解。

1. 令人困惑的：23. never-ending永不停息的 | 24. perplexing令人困惑的 | 25. overwhelming压倒一切的

2. 复杂的：perplexedly 困窘地 | perplexing 复杂的 | perplexity 纠缠

3. 错综复杂的：perpetuity 永久;永存物;年金 | perplexing 错综复杂的 | perplexity 困惑;纷乱;纠缠

4. 使人困惑的：pearl 珍珠,珍品 | perplexing 使人困惑的 | pinhead 针头,小东西

1. 令人不解的；不知道如何处置的
    If you find something perplexing, you do not understand it or do not know how to deal with it.

    e.g. It took years to understand many perplexing diseases...
           许多疑难病症要耗时数年才能搞明白。
    e.g. British Parliamentary procedure is perplexing at the best of times.
           即使在最好情况下，英国议会的程序也很费解。

1. lacking clarity of meaning
    causing confusion or perplexity

    e.g. sent confusing signals to Iraq
           perplexing to someone who knew nothing about it
           a puzzling statement

    Synonym: confusingpuzzling