You can see that in all these countries real estate prices didn't show much trend until recently and now they all have real estate booms.
由图表中可见，这三个国家的，地产价格一直没有明显趋势，只是近年来才出现繁荣。
You see, until recently what makes a planet a planet was one of the simpler concepts astronomy.
你看直到最近，什么组成了一颗行星，行星是天文学里最简单的概念。
You see, until recently what makes a planet a planet was one of the simpler concepts astronomy.
你看直到最近，什么组成了一颗行星，行星是天文学里最简单的概念。
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