田径赛中的起跑线
运动员脚踏上线(即犯规的线)

[ noun ]
line across a billiard table behind which the cue balls are placed at the start of a game
<noun.location>

balkline \balkline\ n.
1. line across a billiard table behind which the cue balls
are placed at the start of a game.

Syn: baulk line, string line.
[WordNet 1.5]