1. oil diffusion ejector pump 
   油扩散喷射泵
2. Our city water systems pump water into high tanks. 
   我市各供水系统都把水打送到高位罐中去。
3. A bicycle pump puts air into the tires. 
   自行车打气筒把空气打进轮胎里。
4. small pump that fills bicycle tires with air. 
   用空气充满自行车轮胎的泵。
5. A tyre expands when you pump air into it. 
   当你打气进去，轮胎会胀大。

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