Non - basic nitrogen - containing series include pyrroles, indoles, carbazoles and benzcarbazoles.不含碱性氮的化合物包括吡咯 、 吲哚 、 咔唑和苯咔唑.Fig 3 Excitation and emission spectra of indoles and its derivative in DMSO.图3吲哚及其衍生物的DMSO溶液的激...
Wombats wanted to wiggle along the ground.袋熊想在地面上扭动前进.There are more than 130 species of marsupials, such as kangaroos, koalas, and wombats.这里有130多种有袋目动物, 像袋鼠, 考拉和袋熊....
They showed keen interest in the various lathes on exhibition.他们对展出中的各类车床表现出了浓厚的兴趣.To automate the control process of the lathes has become very easy today.使机床的控制过程自动化现已变得很容易了.High - speed drilling machine, electric disc...