它提供了飞机前进所需的推力。It provides the thrust that makes the craft move forward.火箭推力的方向是由电脑控制的.The direction of the thrust of the rockets is controlled by computer.火箭作为弹道导弹的推力装置很重要.Rockets are important as thrust units for ballis...
Qitianling granite is a post - collisional , deep - sourced and hypabyssal, early Yanshanian high - K calc - alkaline granite complex pluton.骑田岭花岗岩是燕山早期深源浅成的高钾钙碱性复式花岗岩岩体....
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...