But the complex parts of the software are hidden from the user, and so do not add to the complexity of the users' mental models.

但是这个复杂的部分对用户是不可见的，所以并没有增加用户心理模型的复杂度。

youdao

Perhaps most importantly, testing becomes very natural, even of the most important and complex parts of the business logic.

可能最重要的是测试变得非常自然， 即使是最重要以及最复杂的业务逻辑部分也是如此。

youdao

While this example is very straightforward, others can be very complex, especially when the correlation information is from a message with complex parts.

尽管本例非常简单，但有些示例可能非常复杂，特别是关联信息来自带有复杂部分的消息时。

youdao

You buy the complex parts, like chassis, engines and transmissions.

FORBES: On The Cover/Top Stories

But Prof Colin Pillinger, the scientist behind the ill-fated Beagle-2 mission to Mars, said the printer would have to be really precise to be able to fabricate complex parts that usually make up the body of a spacecraft.

BBC: 3D printers could use Moon rocks, say scientists

It is the way tissue engineering should be going - getting the body to regenerate itself rather than trying to grow complex body parts in a test tube.

BBC: Breasts