我的意思是，我们实在不知道。
虽然我们可能会想起来做点什么、带来一些小小的变化，我们实在不知道我们是否能够扭转乾坤，并且我们还担心无论如何已经为时已晚！
While we may think of something to do that might make a small amount of change, we really don't know if we can make a big enough difference. And we fear that it will all be too late anyway!
问题在于我们真的不知道将会发生什么，因为气候系统实在是太复杂了。
'the problem is that we don't really know what would happen and weather systems are incredibly complex.
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