Conclusion PDGF may participate in glomerular cells proliferation and inflammatory cells infiltration in LN, and may be on factor in the different pathological type formation of LN.

结论PD GF在LN的细胞增生和炎症浸润过程中发挥一定作用，可能是造成不同ln病理类型的中间因素之一。

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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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Prof Stolper compared the signatures with a catalogue containing thousands of Earth rocks, and determined the nearest match to be an igneous type, the formation of which he likened to the production of colonial apple jack liquor.

BBC: Nasa's Curiosity rover finds 'unusual rock'

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

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