Looking through a magnifying glass, Hanley focussed on the most legible fingerprint, which appeared to be covered with a clear finishing coat, like a varnish.
透过放大镜看，汉利将注意力集中到一枚最清晰的指纹上，这枚指纹表面似乎覆盖着一层罩膜，像是一层清漆。
2
Coat the table - top with a thin layer of varnish.