供给量变化的英文：
change in quantity supplied

change是什么意思：
n. 变化；交换，交替；零钱
v. 改变；交换，替换；兑换；更换

change a bed;change the baby.
换床单；给婴儿换尿布

We propose 'a change [making a change / to make a change / that a change should be made].
我们建议应做一点改变。

The change of quantity can causes the change of quality.
量变可以引发质变。

quantity是什么意思：
n. 量，数量，许多，大量

dimensionless quantity
无因次值|无量纲的量

Bill of quantities: The specification of the quantity of materials to be used.
工程量清单;建筑工程清单;数量清单:指项目所用材料的数量及其规格的清单。见priced bill of guantities

Quality is better than quantity
不求其多,但求其精

supplied是什么意思：
adj. 有...提供的，备有...的
v. supply的过去式和过去分词；提供

Demand exceeds supply. The supply is not adequate to the demand．
供不应求

Furnish a village with supplies/furnish supplies to a village
供应某村庄生活用品

air-supply register
空气供应记录器