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- With D,L-lactic acid as monomer,D,L-lactide has been synthesized by polymerization and depolymerization in low vacuum level condition. 为了提高D,L-丙交酯的收率,研究了D,L-乳酸为单体,低真空条件下使乳酸单体先缩聚后解聚制备D,L-丙交酯的工艺条件。
- Effect of different vacuum level on the color of ceramic 不同真空度烧结对瓷颜色的影响
- Using General Gauge to Measure Vacuum Level in Vacuum Degassed Steel -making 应用通用仪表检测真空脱气冶炼工艺过程真空度
- Some pumps and all vacuum cleaners work by suction. 有些泵和所有真空吸尘器都是借吸力工作的。
- I'd like a room on the upper level. 我想要楼上的房间。
- His wife's death left him a vacuum in his life. 他妻子的去世使他的生活变得空虚。
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- Her husband's death left a vacuum in her life. 她丈夫的死使她的生活变得空虚。
- Some people are living in a vacuum. 有些人过着与世隔绝的生活。
- A vacuum cleaner is a handy household tool. 吸尘器是一种使用方便的家庭用具。
- I hope you'll be on the level with me. 我希望你对我坦率布公。
- The shop repairs vacuum cleaners. 这家店修理吸尘器。
- She needs to win this point to level the score. 她要赢得这一分才能将比分扳平。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- 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。
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
- 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。
