单词	第四石段
释义	同Eocän
随便看	compound pendulum compound pendulum compound personal pronoun compound pilot valve compound pipe line compound pistil compound plane tary train compound plllen grain compound poisson distribution compound poisson process compound postion ring compound powder of catechu compound predicate compound prescription compound pressure and vacuum gauge compound pressure gage compound pressure gauge compound probability compound procedural scientific language compound proluvial fan compound proportion compound protein compound pulley compound pump compound q