杰夫: 你在江河或湖海中游过泳 吗 ?Jeff: Have you ever swum in a river or a lake?提示: 浅黄、浅蓝(或湖蓝)是很棒的迷雾颜色.TIP: Light yellow and light blue teal are good fog colors.下切谷的形成是构造运动和海 ( 或湖 ) 平面共同作用的结果.The formation of entrenched valley is the m...