有些地方动物种群是水平分布的，比如在索尔兹伯里平原，这块冰碛沉积三角洲密集分布着王企鹅、软毛海豹、象海豹和黑背海鸥。

Sometimes the animal multitudes are horizontal, as on Salisbury Plain, a glacial outwash delta densely colonized by king penguins, fur and elephant seals, and kelp gulls.

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他们收集了几百块赭石，其中包括两块刻有纵横交叉的三角形和水平横线的石头。

They gathered hundreds of pieces of ocher stone, including two inscribed with crisscrossed triangles and horizontal lines.

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面向初级和中级水平的摄影师，《理解曝光》用简单易懂的文字介绍了光圈、进光量和快门速度这“摄影三角”的基本知识。

Easy to read and straight-forward, Understanding Exposure offers the basics of aperture, lighting and shutter speed, photography’s basic triumvirate, to beginning and intermediate photographers.

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This vector i prime has got a horizontal part, This kind of trigonometry you should know all the time.

矢量 i' 有一个水平方向的分量,这类三角关系你们应该已经很熟悉了

耶鲁公开课 - 基础物理课程节选