例句：
1、This sport demands both speed and strength.
這項運動既需要速度也需要體力。
2、Righting the economy will demand major cuts in expenditure.
恢復經濟需要大量削減開支。
3、It was a time of peak demand for the product.
那是對該產品需求最旺的時期。
4、The product was developed in response to customer demand.
這種產品是為了滿足顧客的需要而開發的。
5、By popular demand, the play will run for another week.
應廣大觀眾要求，這出戲將加演一周。