baseline

基准、基准线、基线

We need a baseline before we can measure any improvement.

我们需要一个基准，才能衡量是否有进步。

底线网球

She hit a powerful forehand from the baseline.

她在底线附近打出一记强劲的正拍。

垒线棒球

The runner stepped off the baseline and was called out.

跑者偏离垒线，被判出局。

基准的、基本的

The clinic recorded baseline data for every patient.

诊所为每位病患记录了基准资料。