几十年来，毛皮贸易一直控制着海狸鼠的数量，但在20世纪80年代末，海狸鼠毛制品市场崩溃，导致这种猫大小的动物的数量疯涨。
The fur trade kept nutria in check for decades, but when the market for nutria collapsed in the late 1980s, the cat-sized animals multiplied like crazy.
“剃尾毛”是一个原本在19世纪的美国骑兵团间使用的术语。
"Shave tail" was a term originally used in the 19th century among U. s. cavalry regiments.
纪昌回到家里，用根牛尾毛将一只虱子吊在窗户上。
Ji Chang returned home and hung a louse on the window with an ox tail hair.
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