picket t line哨兵线
walk the picket line持写有标语之硬纸牌在雇主办公大楼前游行罢工
The Picket Line的警戒线
French hit the picket line法罢工抗议延长工时
N-COUNT（可数名词） A picket line is a group of pickets outside a place of work. (由罢工纠察队员组成的) 纠察线
No one tried to cross the picket lines.
没有人试图越过纠察线。