Alex老师 51Talk中教项目明星教师，英语专业八级，多年英语教学经验。 课堂幽默风趣，气氛活跃，讲课风格大气但不失对细节的雕琢。 Look at the Sky from the Bottom of a Well 坐井观天 There is a frog. He lives in a well and he never goes out of the well. He thinks the ...