【英语时差8,16】关于驯服宠物（中）（在线收听）

Amazingly, after only ten years of selected breeding, the team had developed a strain of foxes with dog like tameness towards humans: tail wagging, face licking, playful friendliness. But that’s not all. Although the scientists always selected foxes based only on behavior, the tame foxes have several other traits that differentiate them from wild foxes. Traits including: white patches of fur on the face, the loss of the fox’s strong musky odor, wagging tails that curl up over the back, drooping ears and dog like barks and whines.