The first mistake that nonnative speakers make is to return a value indicating an error, instead of throwing an exception.
非原生语言使用者的第一类错误是返回一个表示错误的值，而不是抛出异常。
If you set this variable, TCSH displays the exit status whenever a script or program returns a non-zero value, thereby indicating a potential error.
如果设置这个变量，那么当脚本或程序返回非零值时tcsh会显示退出状态，这会指出潜在的错误。
When your applications receive an error indicating that there is not enough storage in the application heap, increase the value of APPHEAPSZ.
当应用程序接收到一个表明应用程序堆中存储空间不够的错误时，应该增加 APPHEAPSZ 的值。
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