At the age of thirty-seven, Sarah invented a mixture that helped her hair and made curly hair straight.

VOA: special.2010.03.28

SK 2007 has still got his hair, has the beard, stands up more or less straight.

我在2007年还有头发，有胡子，站得挺直的。

耶鲁公开课 - 死亡课程节选

When we cut like Asian hair, it's like real thick and straight

当我们给亚洲人剪头发，头发真的又厚又直

我的梦想是当发型师 - SpeakingMax英语口语达人