您要查找的是不是：
- Pound notes have been withdrawn from circulation. 一英镑面值的钞票已停止流通。
- Clouds cause the diffusion of light from the sun. 云使阳光漫射。
- 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。
- The old coins have been withdrawn from circulation.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。
- These ideas have been in circulation for some time. 这些想法已经流行了一段时间。
- diffusion circulation 扩散循环
- After a month in hospital, she is back in circulation. 住了一个月的医院后，她又重新活跃起来了。
- Police say a number of forged banknotes is in circulation. 警方称市面上有一定数量的伪钞。
- The newspaper's circulation has trebled since last year. 去年以来该报的发行量已增加到原来的三倍。
- Insulation used to prevent heat diffusion, as from a steam pipe. 绝热材料用来防止热量散失的绝热材料，如从蒸汽输送管上
- I've been out of circulation in order to prepare for the TOEFL. 为了准备托福考试,我已经不从事社交活动。
- This paper has a circulation of more than a million. 这一报纸的发行量达一百多万份。
- Traditional systems have used oil diffusion pumps. 常规的系统使用油扩散泵。
- Grandpa has been out of circulation after the stroke. 在中风之後,祖父已经不再应酬。
- The diffusion process seems to be accelerating. 传播过程看来正在加速。
- Police say a number of forged banknotes are in circulation. 警方称市面上有一定数量的伪钞。
- Bad circulation can cause tiredness. 血液循环不良会引起人体疲劳。
