A 和/与 B 的 差
差 (chā), when pronounced with the first tone, means "difference" or "discrepancy." It is used as a noun to refer to a gap or variation between two things, such as temperature differences or score margins. Be careful not to confuse it with 差 (chà), which means "poor" or "inferior."
这两个城市的温度差很大。
zhè liǎng gè chéngshì de wēndù chā hěn dà.
There is a big temperature difference between these two cities.
我们的考试成绩差只有两分。
wǒmen de kǎoshì chéngjì chā zhǐyǒu liǎng fēn.
The difference in our exam scores is only two points.
城乡之间的收入差正在缩小。
chéngxiāng zhījiān de shōurù chā zhèngzài suōxiǎo.
The income gap between urban and rural areas is narrowing.