If the platform libraries provide finalizers for cleaning up open file handlers, which greatly reduces the risk of forgetting to close them explicitly, why aren't finalizers used more often?
如果说平台库提供终结器来清除打开的文件句柄，这大大降低了忘记显式地关闭这些句柄的风险，为什么不更多地使用终结器呢？
The flip side is that, in contrast to normal page requests, the portal does not provide any default header information for the response; all information must be explicitly set during resource serving.
另一面在于，与普通页面请求相反，门户不为响应提供任何缺省标头信息；所有信息都必须在资源服务过程中显式地进行设置。
Because your home directory is usually not on your path (and generally should not be), you will need to explicitly provide a path for any executable that you want to run from your home directory.
表示当前目录的子目录。由于您的主目录通常并不在(通常来讲也不应该在)PATH中，因此需要显式地为您希望从主目录中运行的任何可执行文件提供一个路径。
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