竞

jìng to compete; to contend; to struggle

彩

cǎi (bright) color; variety; applause; applaud; lottery prize

app 排行榜

pái háng bǎng the charts (of best-sellers); table of ranking

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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