黄昏已经来临，颜色的对比逐渐退化为黑白两色。 月亮上的田野和森林现在只是这个闪亮的星球的光滑的表面上隐约可见的轮廓。
It was dusk: the contrasts of the colors were fading into a vibrant chiaroscuro; the lunar fields and woods were now just barely visible contours on the taut surface of the shining globe.
有些孔洞显然不是新近形成的，因为已经被脚印或灰尘抹平了，有些则是最近的，因为空洞周围的泥土很光滑，轮廓很清晰。
Some of was not newly formed obviously, as it's been smoothed out by footprints or dirt, while others were recent, because the soil around the hole was very smooth, very clear outline.
为了在工件上加工光滑的轮廓，帕森提出了一种自动的机床控制方式，它能够引导铣床刀具加工出一种“过轴曲线”。
Parsons recommended a method of automatic machine control that would guide a milling cutter to produce a "thru-axis curve" in order to generate smooth profiles on work pieces.
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