demands
A demand is a firm request for something.
There have been demands for services from tenants up there.
那边的房客们要求提供服务。
If you refer to demand, or to the demand for something, you are referring to how many people want to have it, do it, or buy it.
Another flight would be arranged on Saturday if sufficient demand arose.
如果需求量足够大,周六就会再安排一趟航班。
Demand for coal is down.
煤炭需求量下降了。
The demands of something or its demands on you are the things which it needs or the things which you have to do for it.
the demands and challenges of a new job.
一份新工作的要求和挑战。
in (great) demand
If someone or something is in demand or in great demand, they are very popular and a lot of people want them.
He was much in demand as a lecturer in the US, as well as at universities all over Europe.
他的演讲在美国和欧洲的大学都很受欢迎。
on demand
If something is available or happens on demand, you can have it or it happens whenever you want it or ask for it.
a new entertainment system that offers 25 movies on demand.
一经要求即可播放25部电影的新的娱乐系统。
demands , demanding , demanded
If you demand something such as information or action, you ask for it in a very forceful way.
Human rights groups are demanding an investigation into the shooting.
人权组织正强烈要求对这一枪击案进行调查。
Russia demanded that UNITA send a delegation to the peace talks.
俄罗斯强烈要求安哥拉彻底独立全国同盟派遣一个代表团参加和谈。
If one thing demands another, the first needs the second in order to happen or be dealt with successfully.
He said the task of reconstruction would demand much patience, hard work, and sacrifice.
他说重建工作将需要极大的耐心、努力和牺牲。