Their thick coats can insulate them down to minus 20 Fahrenheit. 他们厚重的皮毛可耐受零下三十度的低温
and the bears are keen to shed their thick winter coats. 灰熊急切地想脱下它们厚重的冬衣
Group rubbing not only refreshes their coats, 集体“按摩”不仅能清洁它们的皮毛