an advantage granted or achieved at the beginning of a race, a chase, or a competition because you start early before the official or typical time

因?yàn)殚_始地比較早，在比賽開始時(shí)便擁有優(yōu)勢(shì)

Billy liked to get a head start on his homework before leaving school so he had more time to play with his friends when he got home.

比利喜歡在離開學(xué)校前就開始做作業(yè)，這樣他回家后就有更多的時(shí)間和朋友一起玩。

She took some extra classes to get a head start in her career.

為了能夠在事業(yè)上搶占先機(jī)，她參加了一些額外課程。