For many years the atom was believed to be indivisible.在过去有很多年原子一直被认为是不可分割的.Small as atoms are, they are not indivisible.原子虽小, 但并不是不可分隔的.The two processes are tightly coupled as a single indivisible process.这两个进程紧密结合,成为不...
这一组中包括黄酮类化合物, 二苯甲酮 、 一些香豆素 、 木质素 、 缩合单宁和芪.The group includes flavonoids, benzophenones, some coumarins, lignans, condensed tannins, and stilbenes.生成的有机化合物成分比较复杂,主要成分有苯甲酸酐、苯甲酮等.The organic compounds are mainly benzoic aci...
Vaccination and other prophylactic measures can be carried out.可以采取疫苗接种和其他预防措施。The new measures are aimed at tightening existing sanctions.新措施旨在加强现行的制裁。Such measures would be highly impracticable and almost impossible to...