Check on your earnings, and use online calculators to see if you're on track.
检查你的收益，并利用在线计算器，看看你的选择是不是正确的。
Have you used any of the carbon calculators available online?
您是否有用过网上的碳足迹计算机？
Do you know there are carbon calculators available online?
您知道网上有碳足迹计算机？
Do you know there are carbon calculators available online?
您知道网上有碳足迹计算机？
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