如何使用 "aquatint" 造句

1. Aquatint : it is an etching process on copper or steel by means of nitric acid .
水彩色调:用硝酸在钢片或铜片上作腐蚀的蚀刻法。
2. Oxford , in those days , was still a city of aquatint .
牛津，那时还是一座精雕细刻的城市。