英汉例句双语例句The photograph was made using a camera obscura and a sheet of pewter coated with bitumen of Judea, an asphalt that when exposed to light, hardened permanently.他采用照相暗盒和一块白蜡上涂上曝光后会永久硬化的沥青——朱迪亚沥青。词组短语短语bitumen n of Judea 地沥青