外推

wài tuī to extrapolate

软件

ruǎn jiàn (computer) software

蜘蛛

zhī zhū spider

池

Chí surname Chi

chí pond; reservoir; moat

推广

tuī guǎng to extend; to spread; to popularize; generalization; promotion (of a product etc)

渠道

qú dào irrigation ditch; (fig.) channel; means

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