买

mǎi to buy; to purchase

包包

bāo bāo bag or purse etc; small bump or pimple; hillock

去

qù to go; to go to (a place); (of a time etc) last; just passed; to send; to remove; to get rid of; to reduce; to be apart from in space or time; to die (euphemism); to play (a part); (when used either before or after a verb) to go in order to do sth; (after a verb of motion indicates movement away from the speaker); (used after certain verbs to indicate detachment or separation)

哪个

nǎ ge which; who

平台

píng tái platform; terrace; flat-roofed building

靠谱

kào pǔ reliable; reasonable; probable

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