base line

柯林斯詞典

1. N-COUNT The baseline of a tennis, badminton, or basketball court is one of the lines at each end of the court that mark the limits of play. (網(wǎng)球場(chǎng)、羽毛球場(chǎng)或籃球場(chǎng)的)底線[usu sing]
Martinez, when she served, usually stayed on the baseline. 馬第尼斯發(fā)球的時(shí)候，經(jīng)常踩在底線上。
2. N-COUNT In baseball, the baseline is the line that a player must not cross when running between bases. (棒球場(chǎng)的)壘線[usu sing]
3. N-COUNT A baseline is a value or starting point on a scale with which other values can be compared. (價(jià)值的)基準(zhǔn)[usu sing, oft N 'for' n/-ing]
You'll need such information to use as a baseline for measuring progress. 你需要利用這些信息作爲(wèi)基準(zhǔn)來(lái)衡量進(jìn)展情況。