慢速英语:全球首辆氢动力列车在德国投入使用

音频下载[点击右键另存为]

同步字幕下载[点击右键另存为]

battery – n. device that produces and can store electricity

emission – n. something released into the air, such as a gas

sustainable – adj. able to be used without being completely used up or destroyed

practical – adj. suitable or useful for a situation

turbine – n. large machine that produces power by using gas, steam, etc. to turn a wheel