useful: adj. 1.有用的,有益的,有效的,有帮助的。 2.〔 ...steam consumption: (蒸)汽(消)耗量。 consumption of steam: 汽耗; 水蒸汽消耗no steam consumption: 空负荷汽耗no-steam consumption: 空负荷汽耗useful steam o umption: 有效耗汽量useful steam onsumption: 有效耗汽量actual steam consumption: 实际汽耗guaranteed steam consumption: 保证汽耗specific steam consumption: 单位耗汽量; 耗汽率; 汽耗率specific steam consumption test: 单位汽耗试验; 耗汽率试验steam consumption meter: 蒸汽消耗计steam consumption per hour: 每小时汽耗steam consumption rate: 汽耗率steam-consumption meter: 蒸汽耗量计theoretical steam consumption: 蒸汽理论消耗量be useful: 有用场be useful for: 对…有作用例如be useful to: 对有益; 对…有用useful: adj. 1.有用的,有益的,有效的,有帮助的。 2.〔俚语〕值得称赞的,精通…的 (at)。 make oneself generally useful 事事有用,事事帮得来忙 (He must make himself generally useful. 他可事事都干得来)。 a pretty useful performance 相当精采的演出。 His wife is very useful at cooking. 他的妻子很会做菜。 adv. -ly ,-ness n. consumption: n. 1.消费(量);消尽,消耗,灭绝。 2.【医学】结核病;痨病,肺痨 (=pulmonary consumption)。 The speech was meant for foreign [home] consumption. 那篇讲话是让国外[本国]人听的。 consumption goods 消费品。 consumption of the bowels 肠结核。 consumption tax [duty] 消费税。 by steam: 坐轮船no steam: 不可用蒸汽steam: n. 1.蒸汽,水蒸气,水气,雾,蒸气压力。 2.〔口语〕精神,精力,气力;怒气。 3.轮船,乘轮船旅行。 dry steam干蒸汽。 high steam 高压汽。 a steam limit curve 汽液界线。 In our plant, technical innovation gets up steam. 我们厂的技术革新的劲头增加了。 Now, Tom, let the steam off and come to an agreement. 好了,汤姆,吐完了怨气达成协议吧。 Playing football is one of the ways of letting off youthful steam. 踢足球是青年人散发精力的方法之一。 at full steam 放足蒸气;开足马力,尽力。 by steam 坐轮船。 get up steam 冒水蒸气;振作精神,拿出干劲;愤怒。 have steam on 冒着水蒸气。 let off steam 发泄多余的精力;发牢骚。 put on steam 拿出精神。 run out of steam〔口语〕泄气,失去势头。 under its [her] own steam(指船)依靠本身的蒸汽力。 under steam 被汽力推动着,在航行中;拿出精神。 work off steam 拿出精力[干劲]工作;发泄某种感情。 vi. 1.蒸发,凝结蒸汽;冒水汽;出汗;被水汽弄模糊。 2.利用汽力开动[行驶,航行]。 3.〔口语〕大大进步[进展]。 4.〔口语〕发脾气。 5.〔口语〕〔英俚〕(青少年等在公共场所)结帮抢劫。 vt. 1.蒸,煮;蒸软(木材)。 2.使蒸发;散发。 3.用蒸汽力开动。 steam the meat 蒸肉。 a steamed bun 馒头。 steam a ship through the strait 把轮船开进海峡。 The train steamed into the station. 火车冒着蒸汽开进车站。 That would make him steam again. 那会使得他又发火了。 steam along [ahead] 拚命开。 steam in: 蒸汽人口