超级地球是指那些比地球质量大的系外行星，它们的质量一般约为地球的10倍左右。
A super-Earth is a planet with a mass larger than Earth's, roughly up to 10 times greater.
她预测，同样的过程对于“超级地球”或者系外行星(才被发现的、至少是地球的二倍)可能要花上数亿年。
She predicts that the same process could take up to hundreds of millions of years for super-Earths, or exoplanets that are at least twice as big as Earth and are just now being discovered.
演讲课常常是历史课的亮点，敢说拥有全美最优秀的历史系之一的耶鲁，有着很多具有超级名星地位的历史教授。
The lectures are often the highlight of a history course. Boasting one of the finest history departments in the US, Yale has many history professors of superstar status.
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