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There are two main groups of bats, which are believed to have evolved independently of each other, but both from a common ancestor.

蝙蝠主要有两大类，人们认为它们是各自独立进化的，但都来自同一个祖先。

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both from nineteen seventy-four.

VOA: special.2009.11.30

We want to integrate. So let's take the integral of both sides, going from the initial point to the final point.

分别从初态,到末态做积分，消去微分。

麻省理工公开课 - 热力学与动力学课程节选

Suppose you are being pulled by my favorite animals -- the elephants -- from both sides by equal force.

假设我最喜欢的动物,大象从两边拉你

耶鲁公开课 - 基础物理课程节选

The big bet on China, both from government policy makers and investors, is the Chinese consumer.

FORBES: Stronger Yuan Makes Life Harder For Chinese Exporters

In the 76th minute, the Galaxy (5-4-2) had two great chances, both from Gyasi Zardes.

WSJ: Cahill's header lifts Red Bulls over Galaxy, 1-0

That, in stark terms, was the message both from Mr Vaile and from the developing world.

ECONOMIST: Doubts about Doha | The