名 base,foundation,[化]radical,group;形 (起头的; 根本的) basic,key,primary,cardinal ;
[例句] 肯尼亚的罗伯特·基布是800米决赛入围者中速度最快的选手. Kenya's Robert Kibe was the fastest qualifier for the 800 metres final.
[例句] “小子,这不关你的事!”麦克洛斯基威胁道。 "This ain't no affair of yours, boy!" McClosky said threateningly.