博客提及tpo6 set3探讨某物种在过去一亿年外形变化不大，还发现古老化石与该物种极为相似；tpo41 set2涉及耐旱植物，目的是强化耐旱植物观点及助学生理解适应概念。
tpo6 set3
why it did not change much over the last one hundred million years
这个是外形之类的
Uh we found fossils that old that bear a remarkable resemblance to the tree.
tpo41 set2
C. To reinforce a point about drought-tolerant plants
D. To help students understand the concept of adaptation
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