Anyway, it's this fossilized pollen along with the aquifers and the rock paintings, these three things are all evidence that the Sahara was once much greener than it is today.
总之，这些花粉化石，还有含水层和岩画，这三样东西都证明了撒哈拉沙漠曾经比现在绿得多。
The route was once much travelled but has fallen into disuse.
这条路线旅行的人以前常走，但是现在已不用了。
The discovery of shallow-water fossils indicates that the guyots were once much nearer the surface of the ocean.
浅水区化石的发现表明，平顶海山在过去距离水平面比现在更近。
The snake's enormous dimensions are a sign that temperatures along the equator where the remains were found were once much balmier.
由这条蛇的庞大的身躯可知当时沿赤道的这片区域，温度比现在更高。
The snake's enormous dimensions are a sign that temperatures along the equator where the remains were found were once much balmier.
由这条蛇的庞大的身躯可知当时沿赤道的这片区域，温度比现在更高。
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