1. Mary demanded a room all to herself. 玛丽要求为她自己要一个房间。
2. At the same time, demand falls. 与此同时，需求也下降了。
3. Our products are always in great demand. 我们的产品需求量总是很大。
英英解释
n.
1. the ability and desire to purchase goods and services
2. an urgent or peremptory request
3. a condition requiring relief
4. the act of demanding
5. required activity v.
1. request urgently and forcefully
2. require as useful, just, or proper
3. claim as due or just
4. lay legal claim to
5. summon to court
6. ask to be informed of
