At The Rockefeller University in New York, she is currently studying how skin forms from precursor stem cells, looking for clues that could help researchers understand how defective stem cells can cause cancers and other disorders.

VOA: standard.2010.03.29

They're derived from a precursor called triacylglyceride, which is as glycerol molecule with three fatty acid chains dangling off of it.

它们来源于一种叫三酰甘油的前体,由甘油分子上连接了,三个脂肪酸链构成

耶鲁公开课 - 生物医学工程探索课程节选

We talked about the artificial hip which is a modern precursor of the splint I talked about before.

我们之前说到的人造髋关节,就是由固定腿部的夹板衍生而来

耶鲁公开课 - 生物医学工程探索课程节选

Put simply, a lack of innovative thinking is the precursor to a brand in decline.

FORBES: Leadership Lesson: The Difference Between Google and Apple

The slide of 1994 was a precursor of nothing -- just momentarily higher interest rates.

FORBES: The Hedger: An optimist on the sidelines

And 1998 is a precursor of nothing other than an acceptance of a moderate slowdown.

FORBES: The Hedger: An optimist on the sidelines