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- The cleaning frequency of diffusers is site-specific, and is shown by the reduction of oxygen transfer efficiency (OTE) with time in operation. 本研究提供一种即时监测的方法来量化曝气盘受到污泥所堵塞的情形，并藉以判断何时清洗曝气盘最符合经济效益。
- "Is the filtration system adequate? What's the clean frequency and renew frequency? 过滤系统是否完善？其清洁频率与更新频率是多少？"
- Clean clothes and good manners are prepossessing. 清洁的衣服和良好的举止能给人以好感。
- 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。
- The dentist was cleaning and taking out teeth. 牙科医生正在清洁和拔牙。
- 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。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- Why is it that I always land up cleaning the bath? 为什麽总是该我来洗刷浴缸?
- He was busily employed in cleaning his shoes. 他忙著擦鞋。
- She is cleaning up the kitchen now. 她现在正在打扫厨房。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- She was cleaning the bedroom when he called her. 他给她打电话时她正在打扫卧房。
- She is busy cleaning the fowls in the kitchen. 她正在厨房忙著清除家禽的内脏。
- We'll give the house a thorough cleaning. 我们要把房子彻底打扫一番。
- Cleaning exposed the grain of wood. 清洁使木纹显现可见。
- The sparking-plugs need cleaning. 火花塞要清理一下了。
- The action of cleaning computer viruses. 清除计算机病毒的动作［过程］。
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- Mary makes a fetish of her home; she's always cleaning it. 玛丽太看重她的房子了，她老是不停地打扫。
- 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。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
