Not only can scientists now identify what types of planets exist, they can see how common each type is, yielding clues into the enigmas of planetary formation.

现在科学家不仅能识别行星的存在形式，还能够了解每种类型的数量，找出行星构造之谜的线索。

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HSCs are the major cell type involved in liver fibrosis, which is the formation of scar tissue in response to liver damage.

肝星状细胞是一种与肝纤维化密切相关的主要的细胞种类，它在肝受到损伤时形成瘢痕组织。

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Changing the type of lighting wouldn't have much impact, the scientists suspect, unless cities would use red lights, which don't interfere with nitrate radical formation.

改变光线的种类将不会对环境改善产生太大的影响，科学家质疑道，除非城市将使用红色光线来阻止硝酸盐造成的激变。

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Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar (nyse: CAT - news - people )), came to the rescue in 1996.

FORBES: It's How You Play the Game

Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar), came to the rescue in 1996.

FORBES: Magazine Article