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.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....

n.凹铜版腐蚀制版法...

aquatint的音标：aquatint的英式发音音标为：['ækwətɪnt]aquatint的美式发音音标为：['ækwəˌtɪnt, 'ɑkwə-]...