虽然每天植树是不现实的，但是只要心中有绿意，一木终成林。
It's unrealistic for you to plant a tree every day, but if you have a tree in your heart then you can take care of the whole environment.
罗斯林正试图强调的现实是自己从数十年的研究统计收集到的。
The realities that Dr Rosling is trying to highlight have been gleaned from decades of studying statistics.
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