这些地区被军队封锁包围了。The areas are sealed off and ringed by troops.这一地区已被上百名警察包围。More than one hundred police have ringed the area.市中心随处都是教堂和被咖啡店包围的广场。The town centre is thick with churches and cafe-lined squares....
People set off fireworks and tooted their car horns.人们点燃烟花，按响汽车喇叭。Car horns toot as cyclists dart precariously through the traffic.骑车人危险地在车流中飞速穿行时，汽车喇叭的嘟嘟声响成一片。Berlin people drank champagne, set off fireworks and tooted ...
The optimum operation conditions of ion - exchange are obtained by intercross experimental method.运用正交试验得到了较佳的树脂交换—再生操作条件.These directions embody the trends of integration, intercross and qualification.可以看出沉积物搬运和底形研究的方向体...