为什么一个迭代器暴露底层表示坏？

Why is exposing an iterators underlying representation bad?

youdao

为此，许多系统使用目录清单中的颜色，通常浅蓝色表示好链接，红色表示坏链接。

For this reason, many systems use colors in directory listings, often pale blue for a good link and red for a broken one.

youdao

但是，坏结果并没有出现。柏林查利特医院以及医学院的研究者表示，通过测试，病人骨髓、血液以及其他器官组织都非常干净。

It has not come, and researchers at Berlin's Charite hospital and medical school say tests on his bone marrow, blood and other organ tissues have all been clean.

youdao

if something seems good or bad or whatever.

表示事情的好与坏，或在其他情况下，都可以使用。

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