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- Physical and chemical cleaning was used to el iminate membrane fouling. The results showed that the conventional physical clea ning is able to remove most of cake layer, but has little effect on membrane per meability recovery. 对污染膜进行物理和化学清洗试验表明,常规物理清洗可使滤饼层大部分脱落,但对膜过滤性能的恢复效果较差;
- Is our relative strength growing? 我们的相对力量正在增长吗?
- The agency places about 2000 secretaries per annum. 该代理机构每年可为约2000名秘书安排工作。
- It travels thousands of miles per second. 它一秒钟能走几千英里。
- They are now living in relative comfort. 他们现在过着比较安逸的生活。
- He is a distant relative of mine. 他是我的一位远亲。
- Can your car make a hundred miles per hour? 你的汽车一小时能开一百英里吗?
- These apples cost five yuan per kilogram. 这些苹果每公斤五元。
- We fail one student per year on average. 我们平均每年有一个学生不及格。
- My aunt is my only immediate relative. 我姑母是我唯一的至亲。
- He asked me some questions relative to the subject. 他问了我一些有关这个题目的问题。
- A cousin is a collateral relative. 表兄弟是旁系亲属。
- The car is spinning along120 li per hour. 这车正以每小时120里的速度行进。
- Her aunt is her nearest relative. 她姨妈是她最近的亲戚。
- The hurricane has a speed of 73 miles per hour. 飓风每小时73英里。
- Meals average out at 5 per head. 膳食平均每人5英镑。
- Pressure is force per unit area. 压力就是电单位面积上的力。
- I don't believe that our relative strength is increasing. 我也不相信我们的相关力量正在增长。
- The four and a half per cent bonds are in request. 利息四厘五的债券需求量大。
- Last year its retail price fell20 per cent. 去年,它的零售价格下降了百分之二十。