固体微粒是从溶液中过滤出来的.The solid particles were filtered from the solution.物质是由叫做分子的微粒组成的.Substances consist of small particles called molecules.这些火焰造成了对流漏斗，把许多微粒抛向上层大气。These fires create convection funnels, and throw a lot of p...
The very idea of a sixth form college was novel in 1962.第六学级学院在1962年还是新提法。In Tokyo share prices have plummeted for the sixth successive day.东京股价已连续第6天猛跌。The manufacturing economy contracted in October for the sixth conse...
Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds , if it were not for the protection we get from insect - eating animals.昆虫会使我们无法在这个世界上生存: 如果不是由于...