大约五周前，我发现我们的宠物蜥蜴的皮肤越来越灰暗。
About five weeks ago, I noticed the skin of our pet lizard was growing dusty.
第二天早上，我跟丈夫和孩子们说了蜥蜴的表皮很奇怪这件事。
I reported the strange surface on the skin of the lizard to my husband and children the next morning.
在去年发表的一篇论文中，耶鲁大学的生物学家冈特·瓦格纳报告了一种名为“Bachia”的南美蜥蜴的进化史。
In a paper published last year, biologist Gunter Wagner of Yale University reported some work on the evolutionary history of a group of South American lizards called Bachia.
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