If the specified line is out of range, the start line is set to zero.
如果指定行超出范围，起始行则设为零。
The base line can be set out as a single or double chain.
基线可作为一条单链系或双链系。
The base line can be set out as a single or double chain .
基线可作为一条单链系或双链系。
How often does this line set out?
这次旅行真是非常愉决。
How often does this line set out?
完成旅行要多长时间？
How often does this line set out?
完成旅行要多长时间？
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