常見例句A cloud is a condensation of water vapour. 雲(yún)是由水蒸汽凝縮而成的。A cloud is a mass of vapour in the sky. 雲(yún)是天空中的水汽團(tuán)。Water can be changed into vapour when heated. 水被加熱時(shí),可以變成水蒸汽。It can change water into vapour. 它能把水變成蒸汽。The hot vapour spouted from a rusted pipe. 熱蒸汽從一個(gè)生了鏽的琯子裡噴了出來(lái)。Then a brown vapour is given off. 這時(shí)會(huì)放出一種棕色的氣躰。 返回 vapourously