需求变化的英文：
change in demand

参考例句：

The company is highly responsive to changes in demand.
该公司对需求的变化反应特别迅速。

Recognition of changing demand has been the second Swiss trump.
掌握需求的变化，是瑞士钟表制造公司的第二个制胜法宝。

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。

Changing the rate of cylinder rotation changes the speed selected.
改变圆筒旋转速率就改变被筛选的速率。

Inflammatory changes appear secondary to biochemical changes
炎症变化似乎是继发于生物化学的变化。

demand是什么意思：
n. 要求，所需之物；需求，需要
v. 要求；询问，质问；命令；需要

It is the demand, stupid.
傻瓜，答案是需求。

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

I demand a recount.
我要求重算。

The help are demanding higher wages.
雇工们要求增加工钱。

He made an inexorable demand.
他提出一个无情的要求。