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- As they measured hydrogen sulfide levels taken from tissues of the CSE-deficient mice, the scientists found that the gas was depleted in the cardiovascular systems of the altered mice. 随着他们从缺乏CSE的小老鼠中衡量硫化氢水平，科学家发现在变异的老鼠的心血管系统中，这些气体枯竭了。
- Keywords chronic periodontitis;minocycline-HCl;sulfides levels;gingival crevicular fluid; 关键词慢性牙周炎;盐酸米诺四环素;硫化物;龈沟液;
- Business bounced back to prewar levels. 商业回升到战前的水平。
- I'd like a room on the upper level. 我想要楼上的房间。
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- I hope you'll be on the level with me. 我希望你对我坦率布公。
- She needs to win this point to level the score. 她要赢得这一分才能将比分扳平。
- Keep a level head and phone the Fire Department. 保持冷静，打电话给消防署。
- Interest rates are running at record levels. 利率达到创记录的水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- The ground levels off beyond those houses. 这些房子那边的地变得平坦了。
- We must increase production levels. 我们必须提高生产水平。
- A football field should be level. 足球场地应该平坦。
- The rising level of crime is a sign of the times. 犯罪率增高是这一时代的特徵。
- Radiation reached unheard-of levels. 辐射作用已达到前所未有的程度。
- The effect of sulfides and aromatics wit... 不同的化合物混合对柴油润滑性的影响不同。
- I have told the whole story on the level. 我已经诚实地把整个事情经过讲出来了。
- Find level ground for the picnic table. 找一处平坦的地面放野餐的餐桌。
- This mountain is 1,400 meters above sea level. 这座山海拔1,400米。
- He has a level head in emergencies. 他在危急关头能镇定自若。
