Racek拉采克
racen.赛跑;竞争n.人种;种族;血统v.赛跑;竞赛
races and backgrounds种族和背景
racemic tartaric acid外消旋酒石酸
Raced home in time.及时冲回家
race the bill through使议案飞快地通过
Racecadotril granules消旋卡多曲颗粒
race walking training竞走训练
race-acetylmethadol乙酰美沙醇(镇痛药)
racetrack synchrotron跑道型同步加速器
raceways fish culture河道养鱼
Races are different.族类回系。