To land a chopper safely in the dirt requires sophisticated laser scanners to detect obstacles hidden by dust thrown up by the downdraught of the rotors.
为了使直升机在尘土中安全地着陆需要复杂的激光扫描仪去探测被旋翼的倒灌气流扬起的灰尘所隐藏的障碍物。
2
Now when he had left speaking, he said unto Simon, Launch out into the deep, and let down your nets for a draught.
讲完了，对西门说，把船开到水深之处，下网打鱼。
3
His first act was to kneel down on a large stone beside the row of vessels, and to drink a copious draught from one of them.