How many people live in Beijing?在北京有多少人居住
How many people live in Beijing?在北京有多少人居住？
A: Beijing is so busy! There are so many people.
A: 北京太繁华了。有这么多的人。
B: Yes, it's really a big city, Paul.
B: 是的，这是一个非常大的城市，保罗。
A: What's the population? How many people live in Beijng?
A: 北京的人口是多少？
B: I'm not sure. I think it's about 14 million.
B: 我不太确定。我想大约1400万。
A: 14 million! That's a lot. Beijing is much bigger than London.
A: 1400万！太多了。北京比伦敦大得多。
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Notes:
1. If you want to ask how many people live in a city, or a country, you can ask in these ways: What's the population of Beijing or How many people live in Beijing?如果你想问一个城市或者一个国家有多少人，你可以用这些方法来问：What's the population of Beijing? (北京的人口是多少？)或者How many people live in Beijng?(有多少人住在北京？)
2. If you talk about something, such as a number (or a time) and you cannot be exact, you can use about..., e.g. About 14 million; About 6 o'clock. 如果你谈论一个你不太确定的事情，例如一个数字(或者时间), 你可以用about...(大约....), 例如：About 14 million (大约一千四百万); About 6 o'clock (大约6点).
信息来源：北京市民讲外语活动组委会