即便是从理论上，不同退出战略的正确政策组合也是因国而异的，取决于各国所处的境况。
Even in theory, the right mix of policies in any exit strategy ought to differ from place to place, depending on the circumstances.
即便除去辐射到茫茫太空中的大部分，每小时到达地球的能量理论上仍可供人类使用一年。
Even taking into account the all the energy that's lost in space, enough still reaches Earth in an hour to power the entire planet, theoretically, for a year.
毕竟，所有权限制基本上只停留在理论上：即便欧洲航空公司能购买美国航空公司，他们也不大可能涌进来购买。
The ownership restrictions are largely theoretical in any case: it is unlikely that European airlines would rush to buy their American counterparts, even if they could.
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