demand vt. 1.要求,请求;需要。 2.询问,盘问,追究。 3.【法律】召唤。 demand an interview 要求会面。 The work demands care. 那项工作需要细心。 demand sb.'s name 询问姓名。 demand (sth.) of [from] (sb.) 向(某人)要求(某物)。 She demanded that we let her in. 她要我们让她进来。 vi. 要求,查问。 ★后面子句中的动词,美国人多用假设语气现在式,即第三人称单数现在时不加 -s,如:She demands that he assume the responsibility. (她要求他承担责任。)英国人则用 should assume. n. 1.要求,请求。 2.需要;销路。 I have a demand to make of him. 我对他有一个要求。 supply and demand 供给和需要。 demand for a commodity 商品的需要[销路]。 There are many demands on my purse. 我有许多事情要花钱去办。 be in demand 有需要,销路好。 on demand 请求即(a bill payable on demand 见票即付的票据)。 present one's demands 提出要求。 n. -er 要求者。
heating adj. 1.加热的;供热的。 2.刺激的。 a heating drink 暖身的饮料。 a heating apparatus 供暖装置。 heating pipe 暖气管。 a heating system 暖气系统。 n. 1.加热;供暖;(建筑物的)暖气装置。 2.白炽,灼热。
Based on experiences from european countries on solar energy application and domestic circumstances , presents the schemes and features of typical small - scale solar hybrid heating systems with both domestic hot water and space heating demand 摘要结合欧洲太阳能应用的经验及国内的实际情况,介绍了小型太阳能复合供热系统(包括生活热水和供暖)常用形式的流程和特点。
This paper tries to establish a cwl ( climate - weekday - load ) model to predict the heat demand load of users . based on this and associated with the policy of time - of - use electricity price at present time and its future tendency , a much more economical decision can be made for this system using the optimization method 作为尝试,通过“ cwl (气候-星期-负荷) ”模型预测用户的热负荷需求,并以此为基础,结合当前及着眼未来的分时电价发展趋势,利用优化方法对该系统的经济运行做出决策。