first t base一垒
first metacarpal base第1掌骨基底部
First Base Base Coat第一垒底漆
first search Base Package基本组数据库包
calcaneal axis-first metatarsal base angle跖骨基底部夹角;跟骨轴
talar axis-first metatarsal base angle跖骨基底部夹角
first base man一垒手;一垒员
first base umpire一垒审
N(名词) [baseball]→see base