其轨道速度一定是在每秒几百米。Her orbital speed must be a few hundred meters per second.更为大型的卫星将被送入轨道。Yet bigger satellites will be sent up into orbit.这颗彗星的轨道与地球的轨道交叉。The orbit of this comet intersects the orbit of the Earth....
His job consists of dull, repetitive work.他干的是些单调重复的工作。Suddenly music that seemed dull and repetitive comes alive.突然间，似乎索然无味且反反复复的音乐生动了起来。Robots can relieve people of dull and repetitive work.单调重复的工作,机器人可以代劳。...the repet...