Menstruation (a period) is a major stage of puberty in girls; it's one of the many physical signs that a girl is turning into a woman.

月经（例假）的来到是女孩青春期中经历的一个重要阶段；它是女孩变为女人的众多生理变化之一。

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In China, the stage of high school is a turning point in most students' life, during the three years' study, the students are fighting for their future.

在中国，高中阶段是大部分学生的转折点，在三年的学习中，学生为将来奋斗。

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The risk of the US slow down turning into an outright recession exists, but at this stage we would place only a small probability on such a risk.

美国经济的放缓演变成一次大萧条的可能性是存在的，但现阶段我们认为这种风险发生的可能性比较低。

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While 2011 was marked by the growing influence of angel investors who were drawn to the promise of early-stage bets turning into blockbuster companies like Internet stars Facebook Inc. and Zynga Inc.

WSJ: Cloudy Funding Forecast Ahead For Start-Ups

Chinese-language media across the political spectrum point out that China is at a turning point and critical stage of reforms amid unprecedented challenges.

BBC: China media: New era in Beijing

Founded in 2001, AONE is not even close to turning a profit at this stage of the game, so any long side play of AONE is based purely on the technical read of the charts, and nothing more.

FORBES: Watching AONE For A Bottom