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- It is shown after analysis that the efficiency of roto-jet pump is higher than theefficiency of multistage pump and express pump when it operates in the region of low dis-charge and high lift. 通过分析得出旋喷泵在小流量和高扬程工况下运行时，效率高于多级泵和高速泵，在研究旋喷泵集流管与叶轮匹配及集流管扩散段损失的基础上，给出了设计扩散管水力参数的公式。
- No words can express the grandeur of that parade. 阅兵式那宏伟的场面是无法用语言表达的。
- It is better to express your anger, rather than bottle it up. 生气宁可发泄出来而不要闷在肚内。
- It is difficult to express it in terms of science. 要用科学的字眼来表达它是很困难的。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- I can express myself in good English. 我可以用很好的英语来表达自己的观点。
- The express train is an hour faster than the local. 快车比慢车快一小时。
- It's an express train for Stockholm. 这是一趟开往斯德哥尔摩的快车。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- Try to find your own way to express the idea. 尽量用你自己的语言来表达这个意见。
- This tire is flat; you didn't pump enough air in. 这个轮胎没气了;你并没打足气。
- We have a pump for drawing water from the well. 我们用一个水泵从井里抽水。
- I can't express how grateful I am. 我说不出我有多么感激。
- The heart is analogous to a pump. 心脏和水泵有相似之处。
- I don't know if I express myself clearly. 我不知道我说清楚没有。
- Can you lend me your bicycle pump? 能把你的打气筒借给我吗？
- It's the through express No.163 for Chengdu. 这是去成都的163次直快。
- She is the express image of her mother. 她和她母亲长得一模一样。
- We express our thought by means of words. 我们用词句来表达思想。
- Here is an old-fashioned pump for drawing water from a well. 这里有一个旧式水泵可从井里抽水。
