R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.The results show that zinc acetate - stearic acyloxy has thermal stability and synerg...
With Brainstorming, treat the view on how to solve the problem rightly.利用脑激励法(Brainstorming),正确对待学生实验中的问题解决观.Hundreds of ideas had been tried and discarded during two years of brainstorming.在两年的集思广益期间，已经有上百种设想方案被一一尝试又放弃。...
A vet dispatched the injured cow.兽医把伤牛利索地杀死了。In the old days we got a visit from the vet maybe once a year.以前，兽医大概每年来我们这里出诊一次。Check with your vet about canine hygiene and worming.检查你有无狂犬病和弓形虫病的记录.Injecting animals is all...
这些鞋样式新颖，质量上乘。The shoes were of good design and good quality.这张专辑真棒，新颖、有趣且富于变化。This is a fabulous album. It's fresh, varied, fun.他们的作品一如既往地引人入胜、气韵潇洒、新颖别致，不会让你失望。Their work has all the usual punch, panache and flair y...
水灾和饥荒这一类灾难disasters such as floods and famine水灾是那场大雨造成的.The reason for the flood was that heavy rain.水灾令许多人背井离乡.Many people were uprooted from their homes by the flood....