base·line
noun/ˈbeɪslaɪn/
/ˈbeɪslaɪn/
[usually singular]- (sport) a line marking each end of the court in tennis or the edge of the area where a player can run in baseball
（网球场的）底线；（棒球场的）垒线 - (specialist) a line or measurement that is used as a starting point when comparing facts
（用于比较的）基准，基线 - The figures for 2014 were used as a baseline for the study.
这项研究以 2014 年的数据为基准。
compare bassline - The figures for 2014 were used as a baseline for the study.