cut in line,cut in a line

To cut in line means to push into a queue without waiting in line.有加塞的意思。
例如：It's rude to cut in line. Wait your turn. Don't cut in line.

To cut in a line:例如，你拿着剪子，沿着一条线剪下去。

用线分割

分割了排成一条直线