齿轮传动设计步骤:请问"复杂"的英语单词以P开头的怎么写?

Define 复杂: [ fù zá ]
1. complex
2. complicated

其它相关解释:
<intricacy> <complexity> <complication> <complicacy>

例句与用法:
1. 这是一个复杂的问题，你的回答来得太快了。
It's a complex question and your answer was too pat.
2. 生活正在变得越来越复杂和艰难。
Life is getting more complex and difficult.
3. 我们经常思考人生的美丽与复杂。
I often reflect on the beauty and complexity of life.
4. 我们正面对着一个极复杂的问题。
We are facing a problem of great complexity.
5. 军队是极其复杂的组织。
The army is an extremely complex organism.
6. 向公司索取退款手续很复杂。
Obtaining a refund from the company is a complicated procedure.
7. 税务法非常复杂，只有专家才能解释清楚。
The tax laws are so complicated that only an expert can provide enlightenment.
8. 肖邦的乐曲唤起了她极其复杂的感情。
Chopin aroused very complicated emotions in her

我知道perplexity有复杂的意思，是名词。
还有就是puzzled，是形容词。

1.perplex
2.complex

1.complex
2. complicated

perplex
我好像背过，复杂的

也许是sophisticated？