您要查找的是不是：
- Development and appliation of a crude collecting pump unit 半球摇摆转子泵式收油车的研制及应用
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- How long has Jim gone in for collecting stamps? 吉姆爱好集邮有多长时间？
- We are collecting money for children in need. 我们在为贫困儿童募捐。
- We are collecting money for the famine victim. 我们在为遭受饥荒的灾民募捐。
- I find amusement in collecting stamps. 我发现了集邮的乐趣。
- Suddenly, collecting antiques is all the fashion. 收集古董突然盛行起来。
- He is enamored of stamp collecting. 他迷恋于集邮。
- He is enamoured of stamp collecting. 他迷恋于集邮。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- I must admit I am very fond of collect rare book. 我得承认我很喜欢海内珍本。
- I am hooked on collecting clocks. 我迷上了收集时钟。
- He is collecting materials for a book. 他正在为写书搜集素材。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- I'm collecting money in aid of starving children. 为帮助饥饿的孩子们，我正在搞募捐。
- She went collecting for a charity. 她去为慈善事业募款。
- This tire is flat; you didn't pump enough air in. 这个轮胎没气了;你并没打足气。
- She's collecting material for a newspaper article. 她正在搜集素材在报纸上发表文章。
- We have a pump for drawing water from the well. 我们用一个水泵从井里抽水。
- The boys had a craze for collecting stamps. 那些男孩子们热衷于集邮。
