At this time of the year bears should be fattening up for the winter. 在每年的这个时候 熊必须为越冬储备脂肪

124. a grizzly bear.
     一只灰熊
125. It seems to be an odd creature to find on these high rocky slopes.
     很奇怪这样的动物为何 会爬到如此高的碎石斜坡上
126. It's hard to imagine what could have attracted it here.
     真不知道这里有什么吸引着它
127. At this time of the year bears should be fattening up for the winter.
     在每年的这个时候 熊必须为越冬储备脂肪
128. Yet they gather in some numbers on these apparently barren slopes.
     然而却有一定数量的灰熊 聚集在这片不毛之地
129. They're searching for a rather unusual food -
     它们正在寻找一种很特别的食物
130. moths.
     飞蛾

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 127 行