11. greenhouse gas emission n 二氧化碳排放

　　12. accelerate the pace of global warming v 加速全球變暖步伐

　　13. underline the ozone layer v 破壞臭氧層

　　14. lead to greenhouse effect v 導(dǎo)致溫室效應(yīng)氣體

　　15. …… is a kind of industry that could create a number of job opportunities and promote the prosperity of relevant industries …… 是一種產(chǎn)業(yè)，可以創(chuàng)造許多就業(yè)機(jī)會(huì)以及促進(jìn)相關(guān)產(chǎn)業(yè)的繁榮。

　　16. Only by traveling by air can travelers enjoy the high speed, superior comfort and first-rate service 只有做飛機(jī)旅行，我們才能享受到速度，舒適，一流的服務(wù).。

　　17. International trade and tourism n 國際貿(mào)易和國際旅游業(yè)。

　　18. New types of fuel will definitely be explored and then, substitute some highly polluted fuels. 探究新型的燃料，代替高度污染的燃料。

　　19. Air travel will pose less threat to the environment 空中旅行對于環(huán)境造成較少的威脅

　　20. New type of fuel, which has the trait of low-consumption and eco-friendliness. 具有低消耗和環(huán)保特征的新型燃料。