The color difference could yield surface composition clues to the violent history of Mimas.

颜色差异可能提供土卫一表面组成的线索以了解其动荡的历史。

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The origin of the color differences is not yet understood, but may be caused by differences in the surface composition between the two terrains.

产生颜色差异的原因还不清楚，有可能是两种地形表面成分的差异造成的。

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Color differences are most likely due to regional changes in surface composition or the sizes and structures of the grains in the moon's icy soil.

颜色的差异很可能是因为卫星表面冻土的成分或者粒度与结构的区域性变化。

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We've learned how to identify and catalog cells according to the composition of proteins on the surface and those proteins that distinguish a cell are often called marker proteins.

我们学会了如何按照表面的蛋白成分,来识别并分类细胞,而这些用来区别细胞的蛋白,通常称为标记蛋白

耶鲁公开课 - 生物医学工程探索课程节选

Since cosmic radiation alters surface composition, Curiosity can drill into rock to extract pristine material from below.

CNN: Curiosity opening Martian frontier?

Phase II, planned for 2011, will identify both aquifers down to 3, 000 meters below the surface, study soil composition and aquifer replenishment, and prioritize areas for agricultural development.

UNESCO: launches initiative to identify groundwater and alleviate water shortages in Iraq | United Nations Educational, Scientific and Cultural Organization

Observations of the material coating the dark face of Iapetus indicate it has a similar composition to the surface material on Phoebe.

BBC: New ring detected around Saturn