碳的诸多同位素the many isotopes of carbon碳的化合价是4价。Carbon has a valency of 4.通过环氧化和氧化就得到外消旋的含十八个碳的昆虫返动激素.Epoxidation and oxidation gave the racemic C 18 - juvenile hormone....
There is a lengthy article on Spike Milligan in the Observer newspaper.《观察家报》上有一篇关于斯派克·米利根的长篇文章。Gates responds with a lengthy discourse on deployment strategy.盖茨以一篇有关部署策略的鸿篇大论予以回应。This is not the place for a lengthy disc...
Thousands of its customers are in arrears with loans and mortgage payments.有数千客户拖欠其贷款和抵押贷款还款。The recent rebound in mortgage rates could snuff out the housing recovery.抵押贷款利率最近的回升可能会扼杀房地产的复苏。The bank foreclosed on the mor...
Wine has been produced by traditional landholders in the Alto Douro region for some 2,000 years.在葡萄酒的产区上杜罗,当地人酿酒的历史可以追溯到大约2,000多年前.We also recommend a full day optional excursion to the Upper Douro...我们还推荐去杜罗河上游的短途自选一日游。...