To find the number of rows or their current height, use the lines option.
要查找行数(即行当前的高度)，请使用lines选项。
Number of lines of the current screen.
当前屏幕的行数。
The intersection of these lines is then the current position of the vessel.
这些线的交叉然后是船的目前的职位。
The intersection of these lines is then the current position of the vessel.
这些线的交叉然后是船的目前的职位。
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