论文部分内容阅读
天上乌云密布,知道一场大雨要降临了。突然,一道闪电把天空劈成了两半,紧接着,一颗颗豆大的雨滴从天而降。雨点掉
Clouds in the sky, knowing that a heavy rain is coming. Suddenly, a lightning split the sky into two halves, followed by a big drop of rain from the sky. Rain off