您要查找的是不是：
- A flammable gas,CH3CH: CH2,derived from petroleum hydrocarbon cracking and used in organic synthesis. 丙烯一种易燃气体，化学式为CH3CH：CH2，提炼于石油的碳氢化合物裂化蒸馏，用于有机合成
- A flammable gas, CH3CH:CH2, derived from petroleum hydrocarbon cracking and used in organic synthesis. 丙烯一种易燃气体，化学式为CH3CH：CH2，提炼于石油的碳氢化合物裂化蒸馏，用于有机合成
- A flammable gas, CH3CH: CH2, derived from petroleum hydrocarbon cracking and used in organic synthesis. 丙烯一种易燃气体，化学式为CH3CH：CH2，提炼于石油的碳氢化合物裂化蒸馏，用于有机合成
- Dimerization of dienes mixture in C5 fraction which came from hydrocarbon cracking was carried out in ionic liquids as catalysts. 合成了多种基于1-丁基-3-甲基咪唑阳离子的离子液体,并作为裂解C5馏分中混合二烯烃聚合反应的介质。
- The hydrocarbon cracking catalysts prepared by the silica rich REHY as an active component possessed high cracking activity, low coke formation and high metal tolerance... 用该富硅分子筛作为活性组分制备的烃类裂化催化剂，具有活性高、积炭量低和较强的抗重金属污染能力。
- Technological Progress in Olefin Production by Hydrocarbon Cracking 烃类催化裂解制烯烃技术进展
- Study on hydrodynamics of light hydrocarbon cracking riser 提升管轻烃反应器流体力学性能研究
- A CASING-TUBE RISER REACTOR FOR LIGHT HYDROCARBON CRACKING 用于轻烃裂化的套管式提升管反应器
- A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
- Model for predicting olefin yield distribution of hydrocarbon cracking 烃类裂解烯烃产率分布模型
- The marchers jumped off at the crack of dawn. 行军队伍在破晓时出发了。
- The riot police started to crack down on them. 防暴警察开始对他们采取镇压行动。
- That was a cracking shot he played. 他这一下打得妙极了。
- You'll crack up if you go on working so hard. 你继续这样拚命干下去，身体会吃不消的。
- There's a lot to be done, so let's get cracking. 工作很多，咱们开始干吧。
- Police are cracking down on drug dealers. 警方现对贩毒分子严惩不贷。
- They sat by the fire, cracking jokes. 他们坐在火堆旁讲笑话。
- Have another crack at solving this puzzle. 再试一试把这个难题解决了吧。
- She made a crack about his fatness. 她取笑他肥胖。
- There is a crack in this window. 这扇窗户上有个裂纹。
