The first logical branch point in this situation is the year – freshman, sophomore, junior, senior.

第一个逻辑分支点是年级——大一、大二、大三、大四。

All branches point to the center of the tree, so that's a good collude.

所有的树枝都指向树的中心，所以这是一个很好的连结。

Then, as we go further and hit even more specific branch points, choose a logical category for drilling down to the next level.

然后，当我们进一步深入到更具体的分支点时，就选择一个逻辑类别，以便深入到下一层。

Branch points out that, even if a growing number of official guidelines and textbooks reflect scientific consensus on climate change, unofficial educational materials that convey more slanted perspectives are being distributed to teachers.

布兰奇指出，尽管越来越多官方指南和教科书反映了对气候变化的科学共识，但带有偏向性观点的非官方教学材料仍在被分发给老师。

The ancestors of today's bryophytes were here before the flowers, but the bryophytes and flowers alive right now have been evolving for the same amount of time since they went their separate evolutionary ways at that bottom branch point.

今天苔藓植物的祖先在花出现之前就已经存在了，但现在活着的苔藓植物和花已经进化了同样长的时间，因为它们在底部的分支点上分道扬镳。