外推

wài tuī to extrapolate

式

shì type; form; pattern; style

窗户

chuāng hu window; CL:個|个[ge4],扇[shan4]

怎么

zěn me how?; what?; why?

zěn me variant of 怎麼|怎么[zen3 me5]

擦

cā to wipe; to erase; rubbing (brush stroke in painting); to clean; to polish

玻璃

bō li glass; CL:張|张[zhang1],塊|块[kuai4]; (slang) male homosexual

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