So the task duration is not a single real number, rather it is a random variable that describes the likelihood of completion within a certain range of time.
所以任务持续时间不是一个单一的实数，而是描述一定时间范围内完成的可能性的随机变量。
For Korn shell users, file name completion depends on the value of the EDITOR variable.
对于Korn Shell用户，文件名完成取决于EDITOR变量的值。
If the addsuffix shell variable is set along with automatic Tab completion, it's easier to distinguish folders because tcsh suffixes them with a / character when a match is found.
如果同时设置 addsuffix shell 变量和自动 Tab 补齐，那么在找到匹配时 tcsh 会在文件夹后面加上一个 / 字符，这样就更容易区分出文件夹。
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