Absorption of nitrogen from the air and carbon from contaminating substance has been found on the surface of quartz glass, soda-lime glass and lead crystal glass samples.

在石英玻璃、钠钙玻璃和铅晶质玻璃的表面，发现吸附有来自空气中的氮以及有机沾污物的碳。

youdao

The problems of getting at Lake Vostok (and of preventing organisms from the surface from contaminating it) are, give or take the billion kilometre spaceflight required to get there, the same as those that would arise in any attempt to get a probe into Europa's putative oceans.

ECONOMIST: Planetary pretenders