水箱和屋顶都需要敷设严密的保温层。Water tanks should be well lagged and the roof well insulated.从防守高度严密的监狱的集体越狱a mass breakout from a top security prison这一地区周围设有严密的安全警戒圈.There is a tight security cordon around the area....
我学政治,毕业考头等的.I graduated first in my class in political science.他们是在一家高级旅馆里, 待遇是头等的.They are in a superb hotel, getting A - one treatment.头等的骑手正在赛马场赛马.Top drivers are racing at the race course....