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....
Shepherds penned their flocks.牧羊人把他们的羊群关入栏中.The shepherds sat at one of the tables and Michael joined them.那两个牧民选了一张桌子坐了下来.迈克尔同他们坐在一起.It was not long before the shepherds of Numitor discovered the intruders.不久,纽米托的牧羊人发觉了...