It's true, we may have charted all the continents on the planet and we may have discovered all the mammals that are out there, but that doesn't mean that there's nothing left to explore on Earth.
没错，我们或许已经绘制这个星球上所有大陆板块的地图， 我们或许已经发现了当前所有的哺乳动物， 但这并不代表地球上没什么好探索的了。