外推

wài tuī to extrapolate

式

shì type; form; pattern; style

窗户

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

五金

wǔ jīn metal hardware (nuts and bolts); the five metals: gold, silver, copper, iron and tin 金銀銅鐵錫|金银铜铁锡

件

jiàn item; component; classifier for events, things, clothes etc

怎么

zěn me how?; what?; why?

zěn me variant of 怎麼|怎么[zen3 me5]

更换

gēng huàn to replace (a worn-out tire etc); to change (one's address etc)

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