燧石在压力的作用下碎成了小块。Under the pressure, the flint crumbled into fragments.这里的岩石像燧石一样坚硬.The rock here was as hard as flint.这一岩层中有大量燧石.This layer of rock contains a lot of flint....
他们用液压软管驱动的骨架 、 铰链咬合的齿轮和电缆连接的力臂来保持平衡.The dinos poised in the skeletal power of hydraulic hoses, chained gears, and cabled levers.而颚间牙齿大小的差异,可能会影响矫正治疗最后的结果和咬合的稳定性.Intermaxillary tooth size discrepancy can affect the final ...