For a long time, people thought the varnish used to coat and protect the violins was special.
很长一段时间，人们认为过去用来覆盖及保护小提琴的清漆是特殊的。
2
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。
3
You can put another coat of varnish on. Or you can put the finish on.