Macrodemography
总体人口统计学
🗣️ 情景例句
Now we'll find out about the surprise.
现在我们可以知道是什么样的惊喜了。
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
Let us do it by ourselves，will you?
我们自己做这件事，可以吗？