half-saturation time[生理] 半饱和时间
half-pressure time压力半降时间;半降时间
half-time exchange交换半数时间
half-time shaft半速轴
half-time tactics半小时战术
Energy Half-Time能量半衰时
residence half-time停留半衰期;半存留期;半滞留期
half-residence time[核] 半存期;半落尘时间
Half-Time Rest中场休息
N-UNCOUNT（不可数名词） Halftime is the short period of time between the two parts of a sports event such as a football, rugby, or basketball game, when the players take a short rest. (球赛的) 中场休息
The game started in brilliant sunshine but during halftime fog closed in.
比赛在灿烂的阳光中开始，但在中场休息时却起雾了。