地球熄灯一小时英文作文(最好有翻译)
问题描述：
地球熄灯一小时英文作文(最好有翻译)
答
Earth Hour,an annual international event held on the last Saturday of March,asks people to turn off their lights from 8.30 to 9.30 pm of the local time.Its purpose is to raise people’s awareness of t...