The alkylation of isoparaffin with olefin is an important process of petroleum processing.异构烷烃与低分子烯烃的烷基化反应是石油加工的重要过程之一.Recent advances in ring closing metathesis ( RCM ) reaction, including olefin and enyne metathesis re...
我让他铭记他当时被授予了多么大的荣誉。I impressed on him what a huge honour he was being offered.为表彰他的奉献精神，市长授予他荣誉奖章。For his dedication the Mayor awarded him a medal of merit.他获得了经济学一等荣誉学位。He gained a first class Honours de-gree in economi...
She is currently appearing at the Liverpool Playhouse.她目前正在利物浦剧院演出.There were reports of columns of military vehicles appearing on the streets.有报道说几队军用车辆出现在街头。For the President, the calculations are equally difficult. If...