For dynamically typed languages, the tests must cover possible type errors, too.
对于动态语言来说，测试也必须覆盖可能的类型错误。
With testing, you can have the benefits of dynamically typed languages with much less of the downside.
有了测试，您就能享有动态类型语言的诸多益处，而不利之处则更少。
Many dynamically typed languages are interpreted, so you can see changes immediately after making them.
很多动态类型语言是解释性的，所以在编写程序后可以立即看到变化。
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