仪表盘上的指针一下转到了50英尺处，也就是到头了，然后就停在那里不动了。The needle on the dial went right round to fifty feet, which was as far as it could go, and there it stuck.突然间一团浓雾把飞机笼罩起来, 遮住了仪表盘.Suddenly a thick blanket of fog enveloped the ship , b...
你用不用投影仪？Will you be using an OHP?图像完全对齐时，投影仪的位置就应该固定下来。When the images line up exactly, the projectors should be fixed in place.我们的主人从房里牵出一根延长电线，架起屏幕和投影仪。Our host ran a long extension cord out from the house and set up a...