In the case of defining a planet, IAU made the call, and "now we have to use this definition and try to play the game."
在定义行星这点上，IAU给了行星一个说法，“现在我们就要使用这个定义来完这场游戏了”。
Saturn's job is to delineate reality - it's "the buck stops here" planet - and one of its roles is defining responsibility.
土星的任务是描绘现实。它是一颗“把钱留在这儿”的行星。它的作用之一就是定义责任。
It's not about defining what culture you're from - we are all human beings on the one planet.
这并不是定义你从何而来的文化。我们在同一颗星球上的人类！
The defining challenge of the 21st century will be to face the reality that humanity shares a common fate on a crowded planet.
确定21世纪的挑战就必须得面对一个现实：人类在这个拥挤的星球上拥有一个共同的命运。
The defining challenge of the 21st century will be to face the reality that humanity shares a common fate on a crowded planet.
确定21世纪的挑战就必须得面对一个现实：人类在这个拥挤的星球上拥有一个共同的命运。
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