类似地，readdir和filetype允许您不必了解真实的、底层操作和文件系统的圈套和陷阱。
Similarly, readdir and filetype allow you to remain blissfully ignorant of the machinations and trappings of the real, underlying operating and file systems.
然而在实际操作中，要证明公司的定价低于成本更是陷阱重重。
Proving that a firm is pricing below its costs is tricky in practice.
换句话说，你就不可能误操作从而选择了错误的选项并掉进病毒编写者的陷阱中。
In other words, you won't be able to accidentally choose the wrong option and fall into the virus writer's trap.
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