/dɪˈmɑ:nd; US dɪˈmænd ||; dɪˈmænd/noun1 [C] a demand (for sth/that...) a strong request or order that must be obeyed 要求；命令: a demand for changes in the law 要求修改法律I was amazed by their demand that I should leave immediately. 他们要求我立即离开，这使我大吃一惊。
2 demands [pl] something that sb makes you do, especially sth that is difficult or tiring 要求做的事（尤指难事或累事）: Running a marathon makes huge demandson the body. 马拉松比赛极耗体力。
3 [U] [sing] demand (for sth/sb) the desire or need for sth among a group of people （一群人的）需要，需求: We no longer sell that product because there is no demand for it. 我们不再出售那种产品，因为没有人买。
in demand wanted by a lot of people 有需求；受欢迎:
I'm in demand this weekend -- I've had three invitations! 这个周末我很受欢迎──已经收到三封请帖！ on demand whenever you ask for it 一经要求:
This treatment is available from your doctor on demand. 只要你提出要求，医生就会为你进行这种治疗。