full numbering line 完整编号行
multi-line subscriber numbering 多线订户编号
numbering of in-line engine cylinders 直排发动机气缸编号
We also check if a line is blank, and skip showing and numbering it if so. For example, combined with ls we can get
我们也会检查某一行是否为空，如果是空的话，则不进行显示和编号。
If the answer is YES, the second line should contain a possible numbering of flights.
如果答案是' YES '，那么第二行应该输出一个可行的航线编号方案。
One of the options you can set is number, which turns line numbering on and off (see Listing 1).
可以设置的选项之一是number，它的作用是打开和关闭行号(见清单1)。
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