在喷涂前，对基本表面进行清洗、脱脂和表面粗糙化等预处理是喷涂工艺中一个重要工序。
Spraying at the former, the basic surface cleaning, degreasing and surface roughness, such as spraying pretreatment process are an important process.
从这些研究中，科学家们得出结论，海洋覆盖着原始地球的表面，其中含有构成生命的基本分子。
From these studies, scientists have concluded that the surface of the primitive Earth was covered with oceans containing the molecules fundamental to life.
例如在文件夹里管理文件，它们的原理表面上看起来不同，但是基本的功能都是一样的。
The basic principles, like organizing files in folders, for example, might look different, but the basic functionality is always the same.
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