horizon line

基本解释

The Earth's curvature is visible along the horizon line, or limb, that extends across the image from center left to lower right.
沿着地平线或者侧面，地球的曲线从图片的左侧中部延伸到右下方。
When shooting a scene that includes not just the sky but also other elements like a cityscape, keeping the horizon line straight is particularly important.
如果我们拍摄的画面中除了天空，还有一些其它的元素（如城市景观），使地平线保持水平非常重要。
We can look at this image and easily visualize the horizon line and the buildings stretching past the left and right edges, almost as if we’re looking through a window.
看着这幅画作，我们眼前很容易便显现出：地平线与建筑延伸到了左右两边以外，就好像是透过一扇窗在看似的。

Implied "horizon line" lends stability and repose to composition.
FORBES: The Face of Time
It rose little by little on the horizon line as we power walked our way to it, passed the Kazakhs and Tajiks selling trinkets and wrestling with each other in the square.
FORBES: A 1980s Cold War Kid's View From Moscow