It allows you to open the /etc/passwd file and read each line one at a time, cutting out just the first field in the file and then printing that line.
它允许您打开 /etc/passwd文件，并且每次读取其中的一行内容，仅截取文件中的第一个字段，然后打印这行内容。
This solves the problem of time and space by cutting down on the actual amount of 3D printing required to build the chassis and can be assembled in just minutes.
这样，制作底盘实际所需的3D打印的时间缩短了，三五分钟底盘就能组装完毕，既节省时间也不浪费空间。
This solves the problem of time and space by cutting down on the actual amount of 3D printing required to build the chassis and can be assembled in just minutes.
这样，制作底盘实际所需的3D打印的时间缩短了，三五分钟底盘就能组装完毕，既节省时间也不浪费空间。
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