这是好心办错事，可是确实让我担心了一阵子。This was a genuine mistake, but it did cause me some worry.我正在等几封重要的信件，可是一封都没到。I am expecting several important letters but nothing has arrived.伍德想干出点名堂来，可是总不能如愿。Wood has not had much luck in carving...
竖井已经打下，并且挖有横向矿道。Shafts were sunk, with tunnels dug laterally.空气向下进入竖井,因而失去势能.The air flows down to a shaft and thus loses potential energy.潜水员于上周末进入竖井,但没什么进展.Divers headed into the shafts over the weekend but made little...