base line
base-line的词性:
n.(名词)
1. A line serving as a basis, as for measurement, calculation, or location.
基线:基线,用于测量、计算或定位
2. Baseball An area within which a base runner must stay when running between bases.
【棒球】 垒线:棒球场垒间跑道,棒球比赛中限制跑垒员的垒间跑区
3. Sports The boundary line at either end of a court, as in badminton or tennis.
【体育运动】 底线:位于两条边线尽头的分界线,如在羽毛球、乒乓球中