...新进展 郝家胜 【摘要】:后生动物的早期起源和进化是动物学和进化生物学研究的经典难题,也是构建“生命之树(tree of the life)”系统工程中一个十分重要的领域。
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Biologists also noted deer sniff and lick an unfamiliar rub, which suggests that this visual mark on a small tree plays an important communication purpose in the social life of deer.
生物学家也注意到鹿会嗅和舔陌生的擦痕,这表明小树上的这种视觉标记在鹿群的社会生活中起着重要的交流作用。
You can tell the age of a tree by counting its rings, but these records of trees' life really say a lot more.
你可以通过数年轮来判断树木的年龄,但是作为树木生命的记载,年轮能说明的东西远不止于此。
When we are looking at the life of a tree, we learn about that each period of life brings its own form of joy and challenge.
当我们观察一棵树的生命时,我们了解到生命的每一个阶段都有它自己的欢乐和挑战。
Most visitors spent a long time looking at the display called "The Tree of Life."
VOA: special.2009.12.01
It virtually ignores the tree of life until we get to the end of the story And that's important.
它实际上忽略了知识树,我们读完故事便会发现,这一点很重要。
Second of all the motif of guards who block access to the tree of life suggests that no humans have access to immortality and the pursuit of immortality is futile.
第二点,那些阻止人类接近生命树的守卫,暗示着,任何人类关于永生的尝试,最后都是徒劳一场。
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