Catherine put all the envelopes aside unopened.凯瑟琳把所有信件放在一旁，全都未启封。We've gone through all those envelopes I bought last week.我们用完了我上周买的所有的信封。A courier was despatched with two sealed envelopes.信使受命递送两封封讫的信。What is the...
船闸管理员关上了闸门.The lock keeper closed the lock gate.其他影响选坝的因素有道路, 鱼道, 船闸和筏道等.Other factors that may affect dam selection are roadways, fishway, locks, and log passages.船闸的抗震分析是船闸安全评价的重要内容.Seismic analysis is very important t...