The areas are sealed off and ringed by troops.这些地区被军队封锁包围了。Helicopters with searchlights swept the park which was sealed off.直升飞机的探照灯来回扫射这个被封锁的公园。Police and troops sealed off the area after the attack.袭击发生后警察和士兵将该区域封锁。...
A glass or quartz tube has tungsten electrodes sealed in each end.两根钨丝电极是封在玻璃管或石英管的两端.She sealed the letter.她把信封上了。The milk was sterilized and sealed in bottles.牛奶经过灭菌处理后被封装在瓶子里。She merely filled the containers, sealed t...