demand/ dɪ'mɒːnd /

1.vt.[+apology] [ explanation] [ pay rise] 
(ask for) 要求

2.vt.[+patience] [ attention] 
(require) 需要

3.noun [c] 
(request) 要求

There have been demands for improved services.
一直以来都有改进服务的要求。
4.noun [u] 
(for product) 需求量

Demand for this product is increasing.
对这种产品的需求量越来越大。
5.n pl
demands (requirements) 要求

the demands of a new job
新工作的要求
to demand to do sth
要求做某事
to demand sth from {or} of sb
要求某人某事
I have many demands on my time
我有许多工作要花时间去做
to make demands on sb/sth
对某人/某事提出要求
to be in demand
受欢迎
on demand
随时地