dg 百家

bǎi jiā many schools of thought; many people or households

下

xià down; downwards; below; lower; later; next (week etc); second (of two parts); to decline; to go down; to arrive at (a decision, conclusion etc); measure word to show the frequency of an action

平台

píng tái platform; terrace; flat-roofed building

介绍

jiè shào to introduce (sb to sb); to give a presentation; to present (sb for a job etc); introduction

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