footprint的例句（footprint在句子中的用法）

• We saw no houses, no smoke, no footprint, no boats, no people. 我们没看到房子和炊烟, 也没看到足迹 、 船和人.
• We all need to look for ways to reduce our carbon footprint. 我们都需要寻求降低碳排放量的方法。
• Perhaps the footprint was a hallucination. 脚印可能只是幻象。