In the distance is a mountainous horizon, a wondrously undulating line that makes up the background of this landscape.

在更远一点的地方，是横在边际的山脉，有一道波纹弯曲的美丽线条，作为这幅风景的底层远景。

Some of these masses displayed green veins, as if scrawled with undulating lines of copper sulfate.

有些冰块现出绿色脉管，就象那硫酸铜在上面画的波纹线条一样。

Rendered in charcoal, they present a series of undulating lines, bold shading and billowing clouds.

它们用木炭渲染，呈现出一系列起伏的线条、大胆的阴影和滚滚的云彩。