n.（网球场的）底线；（棒球场的）垒线；基线；零位线adj.[计]基准的，基线的；开始的； 变形： 复数：baselines 英英释义： baseline[ 'beislain ]n.an imaginary line or standard by which things are measured or compared"the established a baseline for the budget"the back line bounding each end of a tennis or han