To manufacture these products, bike frames can literally be grown, with the shape of the stalks manipulated and formed into a variety of styles using a method not unlike that of pruning a bonsai tree.
要生产这样的产品，自行车框架需要慢慢长出来，需要人控制竹竿的生长，使其形成各种形态，而且不像修剪盆景那样。
By using the close relationship of the tree's underground part and upper part, a simulation method of gravity's effect on the tree shape was established.
同时将树的地下部分与地上部分有机地结合在一起，模拟了基于重力场的三维树形态。
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