圆鼓鼓的瓶树基部似皮革，向上逐渐变细，最后生出扭曲的细枝，形似手，紧紧抓着开出的一束束粉花。
The bottle tree, plump and leathery at its base, tapers to a sprout of twisting, hand-like little branches clutching bouquets of pink flowers.
利用最大似然估计原理，给出了构建系统发生树的模型和算法。
A model and an algorithm were provided for constructing phylogenetic tree based on the principle of maximum likelihood estimate.
两个大小不一定相等的星图由一条路连接而成的图叫做似双星树。
A double-starlike tree is a graph with two stars (whose sizes need not be equal) jointed by a path.
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