The apical cell of the first leaf and of the first root originate almost at the same time after the embryo reaches to the 32-celled phase.

胚胎在32细胞阶段后，第一叶顶端细胞与第一根顶端细胞几乎同时发生。

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They are not under any pressure," Veteran diplomat Francesc Vendrell believes before negotiating with Taliban elements, the West should first try to deal with the root causes of disillusionment in Afghanistan - poor government,corruption, and lack of economic opportunity.

VOA: standard.2009.03.11

First of all, it's clear from the Pythagoras' theorem that a is the square root of ^2 + ^2.

首先,根据毕达哥拉斯定理,勾股定理在西方被称为"毕达哥拉斯定理"

耶鲁公开课 - 基础物理课程节选

I first tested it on the square root of 4 and in one iteration it found 2.

我首先测了下求4的平方根4,它只迭代了一次并返回了2。

麻省理工公开课 - 计算机科学及编程导论课程节选

While candy is getting more beer-like, beer is getting more candy-like, as the craft beer industry, which first took root in the 1980s, matures.

WSJ: Hoppy Holidays: Sweet Makers

If you want to understand what is happening there, imagine: Under the Liberty Tree that stood in Boston Common, early in the first American Revolution, any and all could come to air their grievances and hammer out solutions collectively, and it was there the promise of American democracy first took root.

FORBES: Occupy Wall Street And The Rhetoric of Equality

In support of these efforts, last October I launched the Shared-First initiative to root out waste and duplication across the Federal IT portfolio.

WHITEHOUSE: Introducing the IT Shared Services Strategy