目标化合物以甘油、硝基甲烷为三方向起始核心,以从季碳原子三倍对称分散的化合物1~3为分支侧链。
Three branched monomers 1 ~ 3, possessing 3 - fold symmetry and branches emanating from a tetrahedral carbon branch point, were utilized as the key building block in the dendrimer syntheses.
第二条分支到树的特殊遍历中(有关详细信息,请参阅 following-sibling 轴线侧栏)。
The second one branches off into a special walking of the tree (see the The following-sibling Axis sidebar for details).
空气在进入气管前被加热了,在气管的底部分成两个导气管通向每一侧的肺,这两人分支被叫做支气管。
The air is warmed up before passing down the windpipe, where it's divided at the bottom between two airways called bronchi that lead to either lung.
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