您要查找的是不是：
- oxgen concentration 氧浓度
- His area of concentration is nuclear physics. 他的专门研究范围是原子物理学。
- The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
- There is a concentration of people in big cities. 大城市人口集中。
- He seized every chance to break out of the Nazi concentration camp. 他抓住一切机会从纳粹集中营跑出来。
- A state of mental concentration. 专心致志，全神贯注全神贯注的状态
- Exceptionally great concentration, power, or force. 特别强烈的程度，力量或动力
- The POWs burst out from(of) that Nazi concentration camp one night. 一天夜里战俘们冲出了那个纳粹集中营。
- The heat brings about a chemical reaction,and relseases oxgen. 热量引起化学反应，释放出氧气。
- Stress and tiredness often result in a lack of concentration. 紧张和疲劳常使人精神不集中。
- Concentration is essential if you want to do a good job. 如果你想把事情做好,专心是必要的。
- The tennis players need total concentration during play. 网球运动员在比赛中需要全神贯注。
- Oxgen concentrator 氧浓缩器
- He spent several months in a Nazi concentration camp before he broke out. 他在纳粹集中营里关了几个月后逃了出来。
- The Oxgen index of the fire retarding back-coating latex exceed not over 70. 其阻燃背衬胶乳氧指数可达70以上。
- The test results show that a rare-earth concentr... 同时,对试验流程的改进和优化提出了建议。
- This thesis will need all your concentration. 这篇论文需要全神贯注才能读懂。
- Pay respects to Concentration Camp piously. 虔诚瞻仰集中营。
- Check oxygen concentration by a refractometer. 用折射仪测量一下氧气的浓度。
- I found it hard to keep my concentration with such a noise going on. 吵闹声不绝于耳，我很难保持精神集中。
