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...
Gossamer is floating in calm air.空中飘浮着游丝.a gossamer justification站不住脚的辩解The Gossamer Conder, a human - powered airplane, flew into aviation history on Aug. 23,1977.1977年8月23日, “飘忽秃鹰”式人力飞机载入了航空史册.A lover may bestride the ...
Noticed the bee's momentary orienting pause before heading back to the hive.注意到蜜蜂在返回蜂房前为确定方向而短暂停留.This inclination suggests how deeply rooted the orienting response is.这种倾向显示了人类的导向反应是多麽根深柢固.Introduced the slide show...