这是因为当你观察云层的时候，你会发现它是平滑的过渡和尖锐的明暗对比与清晰的明亮的轮廓线两种类型奇怪的混合。
It's because when you take a look at the cloud, you'll find out that its kind of a strange blend of smooth transitions in one hand and sharp contrasts with hard and bright Outlines on the other.
得出的图片突出显示了星际尘埃和气体群的轮廓所形成的明亮的后掠式突起。
The resulting image highlights the bright swept-back ridges that outline pockets of cool interstellar dust and gas.
在平静的天空中细瘦的新月持续朝着金星靠近，金星明亮厚实的月牙形让山脉中的地平线轮廓分明。
In steady skies the slender Moon is still sliding toward Venus, the bright planet's compact crescent just clearing the mountainous horizon.
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