...a sweetish smell of ether and iodine.乙醚和碘酒的香甜气味Williamson reaction is one important method to prepare unsymmetric ether.Williamson反应是制备不对称醚类化合物的重要方法.One new solvent free impregnating resin based on unsaturated polyest...
He spent his weekends poking around dusty old bookshops.他周末都泡在布满尘埃的旧书店里.We can certainly do without John poking his nose in every five minutes.我们当然不需要约翰每隔五分钟就来干扰我们一下.He has been poking in again trying to find things out....