The physical properties of rubber accelerator 2 - mercapto benzothiazole and main methods for its preparation are introduced.介绍橡胶硫化促进剂 2- 巯基苯并噻唑的物理性质和主要的制备方法.He eased his foot off the accelerator.他松开了油门。Today many radioi...
现在，本医院可提供最好的化验（见第17章）。Today the best tests are performed in the hospital .see chap. 17..理查德叔叔吟诵了《圣经》中的一章，又即兴作了一段祈祷文。Uncle Richard intoned a chapter from the Bible and improvised a prayer.最后两章中的很多说法是对前面段落的呼应。Many phrases ...
He's got to put cash down.他必须先付一部分现金。The dealer reduced the price for cash down.这家商店对付现金的人减价优惠.John always cash down for anything he buys.约翰经常买东西时当场就付现金....