IBM公司也把重心从特大型机转向了个人电脑。IBM has also shifted its focus from mainframes to personal computers.海德转移了一下重心，就感到自己往前倾，开始失去平衡。Hyde shifted his weight and felt himself teeter forward, beginning to overbalance.孩子们是她生活的重心。Her childr...
The snake charmer reached out gingerly to touch the snake in his Basket.耍蛇人小心翼翼地伸手去摸他筐子里的那条蛇.We were very much surprised when snake charmer suddenly began to play jazz.我们感到非常惊奇,当耍蛇人突然又吹奏起爵士乐....
He developed an armillary sphere, on which were carved all the astronomical phenomena known time.经过多年的观察,他研制了一架“浑天仪”.凡是知道的重要天文现象, 都刻在“浑天仪”上了.And a new type sphere - conical roller and globoid cam graduator is designed.并在...