This paper analyzed the spatial characteristics of tree-like river networks, and built vector model based on graph theory.
以树状河系为研究对象，分析其空间特征，建立基于图论的水系网矢量模型。
You aim at some astonishing peak or a swerve of the river, then examine the screen on the back of your digital camera. A rogue, blurring tree has dived across like a goalkeeper to block your shot.
你把镜头对准令人赞叹的山峰，或者蜿蜒曲折的河流，按下快门后你去看数码相机的显示屏幕——一棵淘气的树像牧羊人那样站在那里遮挡了你的镜头。
He points to the chewed bark. "They like to stand and bite the tree just to say to other bears, I'm here using this river."
他指着被啃过的树皮，“他们喜欢这样站着啃咬树皮，就是为了告诉同类，这段河流是我的领地。”
If mineral veins sometimes resemble botanical illustrations, blame it on Earth's molten nature and fluid mechanics: when seen from above, a branching river also looks like a tree.
矿脉其实有时会像植物图鉴，是因为地球的熔融性质和流体力学机制：当我们俯视的时候，就能看到像树枝一样的分支河流。
He was as white as ivory, his lips were like the petals of a red flower, his eyes were like violets by a river of pure water, and his body was like a young tree in a green field.
他的肌肤就像象牙一样白，嘴唇像红色花瓣，眼睛则像长在清澈河畔的紫罗兰，而他的身体就像翠绿平原上的小树。
He was as white as ivory, his lips were like the petals of a red flower, his eyes were like violets by a river of pure water, and his body was like a young tree in a green field.
他的肌肤就像象牙一样白，嘴唇像红色花瓣，眼睛则像长在清澈河畔的紫罗兰，而他的身体就像翠绿平原上的小树。
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