QQ问问_pmb520 ... change in demand 需求变化 change in quantity demanded 需求量变化 change in quantity supplied 供给量变化 ...
双语例句
1
In spite of foot thick charts, in spite of diagnoses which haven't changed for years, I've tried to keep myself open to the fact that today is a unique day for me and him or her.
Shehad one foot on the boat, but then suddenly, she changed her mind and went back to the ship.
她已有一只脚落在船上,但突然,她改变主意又回到船上。
3
After 13 years of tinkering, the inventor from Iowa introduced a 10-foot-long contraption that sliced and stuffed loaves of bread into wax paper wrapping. The world changed.