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- optimal fluoride level 适宜氟水平
- Methods To detect fluoride level in the 5 handpump water samples of each natural village by screening. 方法以自然村为单位开展筛查,采集5份手压井水样做氟化物含量测定。
- Objective:To find out dynamic changing laws of water fluoride level after conducting the project of lowing fluoride content in drinking water. 目的:了解降氟改水工程后水氟含量动态变化规律。
- In adults, the same fluoride level appears to increase the risk of bone fracture and, possibly, of moderate skeletal fluorosis, a painful stiffening of the joints. 对成人来说，相同剂量的氟化物看来会增加骨折的风险，并可能造成骨氟中毒，使得关节僵硬疼痛。
- Conclusions Fluoride level of main foods were not main source of intaking fluoride of residents living in the endemic drinking brick tea fluorosis area. 结论饮茶型氟中毒病区居民主要食物中的氟含量不是构成氟中毒的主要致病因素。
- Results The prevalence of chidrens detal fluorosis and the fluoride levels in urine were changed with the changing of the fluoride con centration in drinking water. 结果氟斑牙患病率和尿氟水平随饮水氟含量的变化而变化；
- fluoride levels of 0.2 parts per million 百万分之零点二的氟化物含量
- Report: Children at Risk From High Fluoride Levels 报告显示:儿童深受高氟威胁
- 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。
- 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。
- 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。
- The ergonomics of the new office were felt to be optimal. 新办公室工效设计因素感觉十分理想。
- He has a level head in emergencies. 他在危急关头能镇定自若。
