介绍:
Day71.
People in prehistoric times created paints by grinding materials such as plants and clay into powder and then adding water.
史前的人们制造颜料是将植物和泥土磨成粉末，然后加水。
Prehistoric 美 [ˌpri:hɪˈstɔ:rɪk] adj.史前的;陈旧的
Pre-graduation; prepare, present, preface
Post-graduation
He has a collection of prehistoric insects preserved in amber.
他收集有保存在琥珀中的史前昆虫。
We took a special trip to see Stonehenge [ˌstoʊnˈhendʒ], a prehistoric monument of great antiquity.
我们专程去看了巨石阵，那是年代久远的史前遗迹。
