您要查找的是不是：
- clean circulation cracking 干净循环裂化,馏出原料的裂化
- open circuit of clean circulation water 净环水开路循环
- Clean clothes and good manners are prepossessing. 清洁的衣服和良好的举止能给人以好感。
- Pound notes have been withdrawn from circulation. 一英镑面值的钞票已停止流通。
- Let's clean down the board before we paint it. 让我们在上漆以前把这块板洗干净。
- That was a cracking shot he played. 他这一下打得妙极了。
- It's important for the college freshman to keep his nose clean. 对大学新生而言洁身自好是很重要的。
- There's a lot to be done, so let's get cracking. 工作很多，咱们开始干吧。
- Police are cracking down on drug dealers. 警方现对贩毒分子严惩不贷。
- Harvey discovered the circulation of the blood. 哈唯发现了血液循环。
- We observed the circulation of blood in frogs. 我们观察了青蛙的血液循环。
- They sat by the fire, cracking jokes. 他们坐在火堆旁讲笑话。
- The old coins have been withdrawn from circulation. 旧硬币已经收回不再流通了。
- Many forged notes are in circulation. 许多假钞在流通。
- This magazine has a large circulation. 这本杂志发行量很大。
- He is surprised to find his room thoroughly clean. 他惊讶得发现他的房间给彻底地打扫了。
- I use an oily rag to clean my bike with. 我用沾满油污的碎布擦我的自行车。
- These ideas have been in circulation for some time. 这些想法已经流行了一段时间。
- I was clean broke in less than four days. 不到四天我就一个钱也没有了。
- The mayor is determined to clean up the city. 市长决心清除市内的不良现象。
