half: n.(pl. halves )1.半,一半;一部分。2.半小时;半英里;半品脱;半价票;〔美国〕半美元;半学年,一学期。3.(球赛的)半场,半局,半盘,半回合。4.(足球)中卫(= halfback); (运动中的)配手,合作者。5.(高尔夫球赛等)相同得分。6.(尤指打官司的)一方。短语和例子half past four = 〔美国〕 half after four 四点
We can only measure the difference between the potentials of two half cells when they are linked to form an electrochemical cell . 当两个半电池连接形成一个化学电池时,我们仅能测定两个半电池之间电位的差值。