complex, complicated, sophisticated, intricate
这些形容词均含“复杂的”之意。
complex : 侧重内在关系的复杂，需通过仔细研究与了解才能掌握和运用。
He had not a particularly complex mind.（他的头脑并不十分复杂。）
complicated与complex的含义接近，但语气更强，着重极其复杂，很难分析、分辨或解释。
This is the most complicated case I have ever handled.（这是我所处理过的最为复杂的案子。）
sophisticated : 侧重指事物发展到或达到高级的程度所体现出的复杂。
This is a very sophisticated machine.（这是一台非常精密的机器。）
intricate : 着重指错综复杂，令人迷惑理解。
I have a novel with an intricate plot.（我有一本情节错综复杂的小说。）
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