太空望远镜拍摄到了迄今为止最清晰的冥王星的照片。The space telescope has taken the clearest pictures ever of Pluto.天文学家知道冥王星与海卫一拥有几乎相同的体积、质量与密度。Astronomers know that Pluto and Triton have nearly the same size, mass, and density.冥王星似乎受到过严重撞击，倾斜了1...
那两个秤锤互成平衡.The two weights counterbalance each other.研究了秤锤树的生态地理分布 、 生物学特性与繁殖技术.The eco geographical distribution, biology characteristics and propagation techniques of were investigated in this paper....
He was determined to track down the cause of food spoilage.他决心查出食品腐烂的原因.Car manufacturers stamp a vehicle identification number at several places on new cars to help track down stolen vehicles.汽车制造商在新车的好几处地方打上车辆识别号码，以便于追...
带秤将开动料箱的振动器,以使物料继续流动.The weigh belt will turn on bin shaker to start the material moving again.座垫采用高频振动器, 腿部捶击器.The seat pad adopts the high - frequency vibration device, shank thumping device.簧片就是产生声音的振动器.A reed is the ...