现在到了你该赶紧动起来的时候了吧？Isn't it about time that you pulled your finger out?我得赶紧走了。几分钟后要开个会。I've got to rush. Got a meeting in a few minutes.不赶紧行动就没机会了。If you don't do it soon you're going to lose the opport...
三氟丙炔和全氟丁烯 -2 在这个区域也出现双重谱带.Duplication of bands in this region is also shown by trifluoropropyne and perfluoro 2 - butene.三氟丙炔和全氟丁烯 -2 在这个区域也出现双重谱带.Duplication of bands in this region also shown by trifluoropropyne and pe...