用黑色毡头笔画出基本轮廓（见图4）。Draw the basic outlines in black felt-tip pen (see fig. 4).从上往下俯瞰，山谷呈现出人形轮廓。Viewed from above, the valleys form the shape of a man.他摸着自己轮廓分明的下巴想了一会儿。He thought for a moment, stroking his well-defined ja...
Relations between the two countries have plumbed new depths.两国关系已降到了最低谷。Last night's harrowing television pictures plumbed new depths of depravity.昨晚触目惊心的电视画面堕落到了新低。He had a washing machine plumbed in.他已把洗衣机的各种管子都接好...