Geologist thinks that fault is the surface expression of focus.
地质学者认为断层是震源在地表的表现。
Notice that when you focus below the surface, it is not in focus as a track would be.
注意当你聚焦到表面之下的时候，它不像轨迹那么清晰。
Surface coating technology is the focus of attention of the world.
表面涂层技术也是当今世界关注的热点。
Surface coating technology is the focus of attention of the world.
表面涂层技术也是当今世界关注的热点。
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