"life is like Ephemera in the world, a drop in the sea", in the vast universe, life is short.

“寄蜉蝣于天地，渺沧海之一粟”，在茫茫的宇宙中，人的一生是很短暂的。

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Comparing my own shortcomings with your outstanding advantages, I will never be complacent; however, I feel that an individual is just a drop in the sea.

对比自身不足，每人所具突出优点，使我永远也自满不起来了，反而觉得个人不过沧海之一粟。

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In 2005, sea ice extent fell to another low, 2.15 million square miles, and then, in 2007, it underwent a massive drop, to 1.65 million square miles, the lowest yet.

到2005年，冰川面积下降到了另一个低值——215万平方英里，而到2007年，冰川面积下降到了历史最低——165万平方英里。

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Nadel points to Ohalo, a site he excavated near the Sea of Galilee that had been submerged for 20, 000 years before a drop in water level made it easy to excavate.

CNN: Mysterious structure found at bottom of ancient lake

Nadel points to Ohalo II, a site he excavated near the Sea of Galilee that had been submerged for 23, 000 years before a drop in water level made it easy to excavate.

CNN: Mysterious structure found at bottom of ancient lake