Ban Ki-moon told reporters this conference must be the turning point in global efforts to prevent runaway global warming and usher in a new era of environmentally sustainable growth.

VOA: standard.2009.12.09

This was a kind of turning point in the movement.

这是这一进展中的转折点。

耶鲁公开课 - 现代诗歌课程节选

At some point, when your dollars were turning into dimes, you'd say, forget this, this is ridiculous, it doesn't make any sense for me to own these risky small-cap stocks.

当一块钱变成一毛钱,你会说,得了吧,这太荒谬,持有这些高风险的小盘股,对我而言没什么好处

耶鲁公开课 - 金融市场课程节选