您要查找的是不是：
- The primary function of a regulator is to reduce high-pressure gas in a cylinder or process line to a lower, usable level as it passes from the cylinder to a piece of equipment. 调整器的主要功能是，当钢瓶或过程管道内的高压气体从钢瓶流向设备时，把压力降到较低的可用的水平。
- maximum usable level of sensitivity 最高可用灵敏度电平
- He told me which wells were usable along the road. 他告诉我沿线那些井是可用的。
- I'd like a room on the upper level. 我想要楼上的房间。
- New techniques make it possible to recover usable things from waste. 藉新技术即能从废弃物中回收可用之物。
- 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。
- The act of obtaining usable substances from unusable sources. 废物利用从无用的东西中获取有用物质的行为
- 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。
- He has a level head in emergencies. 他在危急关头能镇定自若。
- If the table top isn't level, things will roll off. 如果桌面不平，东西就会滚下来。
- The level of inflation has gone beyond 8%. 通货膨胀率已经超过了8%。
- Add one level (ie not heaped) tablespoon of sugar. 加一平餐匙糖。
- I think your old canvas schoolbag is still usable. 我觉得你那个旧帆布书包还能用。
