The cluster is so massive and so compact that it bends light from galaxies that lie behind it, causing many of them to appear as stretched out arcs.

由于该星系团十分庞大而紧密，使得背后星系发出的光线发生扭曲，像是延伸出来的一条条弧线。

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As sea level rises, the weight on one end increases, causing the plank to bend so pressure goes up at the end but down in the middle where the plank bends upward (see sketch above).

FORBES: The Link Between Global Warming, Sea Levels And Volcanoes