您要查找的是不是：
- An experimental research has been taken on heat efficiency, startup behavior, isothermal characteristics of a vacuum phase change heating system using a new kind of compound working medium. 摘要利用新型复合工质对真空相变供热系统进行了热效率、启动特性、等温特性的实验研究。
- Some pumps and all vacuum cleaners work by suction. 有些泵和所有真空吸尘器都是借吸力工作的。
- His wife's death left him a vacuum in his life. 他妻子的去世使他的生活变得空虚。
- Her husband's death left a vacuum in her life. 她丈夫的死使她的生活变得空虚。
- Some people are living in a vacuum. 有些人过着与世隔绝的生活。
- The child is going through a difficult phase. 那孩子正经历困难的阶段。
- A vacuum cleaner is a handy household tool. 吸尘器是一种使用方便的家庭用具。
- The shop repairs vacuum cleaners. 这家店修理吸尘器。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- The two sets of traffic lights were out of phase. 那两组交通灯不同步。
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
- They have decided to phase in the new techniques. 他们已决定逐步引入新技术。
- The windshield wipers are out of phase now. 挡水玻璃刮水器现在动作不协调。
- Sealed under low pressure or a partial vacuum. 抽空密封的在低压或部分真空状态下密封起来的
- Dirt and dust are drawn into a vacuum cleaner by suction. 污物和灰尘被吸入吸尘器。
- We could not pull apart two plates which enclosed a vacuum. 如果两个盘子间是真空，我们就无法将它们分开。
- A phase or an aspect of a logically developing process. 契机一个按逻辑发展过程的阶段或方面
- Operating by means of suction or by maintaining a partial vacuum. 抽真空的用吸取的方式或用维持部分真空的方式来运作的
- British Leyland has announced plans to phase out some of its cars next year. 英国雷兰德汽车公司已宣布他们明年将逐步淘汰某些型号的汽车的计划。
- The army plans to phase out the equipment as it becomes obsolete. 军队计划淘汰这些设备，因为它们已经报废了。
