买

mǎi to buy; to purchase

球

qiú ball; sphere; globe; CL:個|个[ge4]; ball game; match; CL:場|场[chang3]

用

yòng to use; to employ; to have to; to eat or drink; expense or outlay; usefulness; hence; therefore

什么

shén me what?; who?; something; anything

正规

zhèng guī regular; according to standards

app 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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