1. The lack of light in Europa's subsurface ocean doesn't automatically rule out life forming. 木卫二的地下海洋缺乏光线，但这没有排除生命形成的可能性。
2. So the lack of light in Europa's subsurface ocean doesn't automatically rule out life forming. 因此，木卫二的地下海洋中光线的缺乏，并不意味着不可能有生命形成。
3. Some plants store reserves of water to see them through a drought; others send roots deep down to subsurface water supplies. 有些植物储存水分来使它们度过干旱；另一些则把根深深地扎入地下水源。
4. Both surface and subsurface data could be used together. 表面和次表面两种资料可配合使用。
5. This study is concerned essentially with subsurface water. 这里的研究主要针对地下水。
