The moon makes the tides —the changes in the level of the sea .

月球可以制造潮汐—海平面的变化。

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Fossils of trees tell us that the temperature dropped a lot and that the level of the sea dropped as well.

树木的化石告诉我们气温大大地降低了，海平面也降低了。

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The same has happened to the "altitude tent", developed by AIS to replicate the effect of altitude training at sea level.

“高原帐篷”也是如此，这是澳大利亚体育学院为了模仿在海平面高度地点的训练效果而设计研发的。

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It ends at the Dead Sea, the lowest point on Earth, four hundred meters below the level of the Mediterranean Sea.

VOA: special.2009.05.18

Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light.

VOA: special.2010.11.10

When the city was founded about one thousand six hundred years ago, the level of the Adriatic Sea was almost two meters lower than it is today.

VOA: special.2009.04.22

An approaching hurricane can actually raise the level of the sea and pull it right up and over the coastline.

CNN: Hurricanes -- slow, methodical, deadly

The south-east corner of Britain is gently subsiding while the sea is rising, as it warms, so the relative level of the sea is increasing.

BBC: Legacy of Britain's great flood

"It depends on the level of the sea and sometimes it's about the stability of the way we put the sandbags, " Ms Yingluck told reporters.

BBC: Thailand PM Yingluck hopeful as inner Bangkok stays dry