◆to cross the line
(in race)撞线；到达终点线
the first runner to cross the line第一个撞线的赛跑者
(pass a limit)超越界限
I understand it's a difficult situation but on certain occasions you crossed the line.我明白处境很困难, 但是有几次你做得太过分了。
There's a fine line between confidence and conceit. I don't want to cross that line.自信和自大只有一线之隔, 我不想跨过那条线。
to cross the line between politics and sport跨越政治和体育之间的界线