Flipped
v. 轻弹( flip的过去式和过去分词 ); 按（开关）; 快速翻转; 急挥
🗣️ 情景例句
They graduated from high school last year.
他们去年高中毕业。
He alone is poor who does not possess knowledge.
没有知识，才是贫穷。
What will be the population of these countries in the year 2000?
2000年不太发达国家的人口将是多少？