您要查找的是不是：
- 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。
- Flies' feet stick to surfaces by suction. 苍蝇的脚借吸力可附着于物体表面上。
- We'll get the water out with a suction pump. 我们将用抽水机把水抽出来。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Dirt and dust are drawn into a vacuum cleaner by suction. 污物和灰尘被吸入吸尘器。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- 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
- The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
- Reconnect main lumen to suction source. 请将主腔管道连接吸引源。
- suction ratio 吸力比
- Air is drawn in through reeds by suction bellows. 空气通过簧片引入吸气风箱。
- What you need is a suction machine. 你需要一台吸尘器。
- After-tax profit margin is the ratio of net income to net sales. 税後利润率指净收入与净销售之比。
- The ratio of men to women was two to one. 男女的比例是二比一。
- Yes,please. I'd like some suction cups. 是的,我想买几个吸盘。
- Yes, please. I 'd like some suction cups . 是的。 我想买几个吸盘。
- The interval between any two frequencies having a ratio of2 to1. 倍频程频率比率为2比1的两个频率的间隔
- Vacuum cleaners work by suction. 真空吸尘器靠抽吸除尘。
- Belt-driven centrifugal suction charging pump. 皮带传动喷淋泵。
