减半: reduce by half作用: act on; affect减半: halve半作障泥半作帆: when gaily the emperor toured the south把减半: reduce by a half减半法: halving method减半音: dim diminished将…减半: halve减半传递: halves pass将减半音: decrease by a semitone困难减半: a trouble shared is a trouble halved; a true friend is known in the day of adversity频率减半: frequency halving衰减,减半音: dim diminished速度减半: slow递减半数时钟: countdown clock强度减半厚度: half-thickness; half-value thickness把……平分为二;将……减半: halve频率减半器,分频器: two-to-one frequency divider染色体数目减半: meiosis使用半量,使剂量减半: to have the dose halved作用: 1.(产生影响) act on; affect 摩擦力作用于运动着的物体, 并使其停止。 friction acts on moving bodies and brings them to a stop.2.(产生影响的活动) action; function 反作用 reaction; 化学作用 chemical action; 酸对金属所起的作用 the action of acid on metal3.(影响; 效果) effect 副作用 side effect; 积极作用 positive role; 起作用 take effect4.(用意) intention; motive; 作用范围 action range; reach; sphere of action; 作用方式 mode of action半减速时间,速度减半时间: deceleration half-time自己的冰冻时间减半: half freeze duration半吸收厚度 半值层 强度减半厚度: half-valuethickness双边节省的装卸时间的速遣费减半: dhdltsbe demurrage harf despatch lay time saved both ends