This suggests the seasonal removal of some of the ocean's weight at continental margins as sea level drops could be triggering eruptions around the world, says Pyle.
这可能因为大陆边缘海平面季节性下跌触发世界各地火山喷发。 派尔说。
They knew that every so often during past ice ages, drops in sea level created a land bridge across the strait.
在最后一个冰期期间，他们了解到海平面的下降偶尔会产生横跨海峡的陆桥。
The Boston Marathon begins at 475 feet above sea level and drops all the way to 16 feet by the end.
波士顿马拉松赛起点海拔475英尺，终点海拔16英尺，总落差达459英尺，已经超出了规定。
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