So, you either have to migrate like geese or hibernate like ground squirrels. 所以,你要么像大雁一样迁徙,要么像地松鼠一样冬眠。 Grizzly bears hibernate. Their behaviors are closely synchronized with the seasons. 灰熊会冬眠。它们的行为与季节变化紧密地保持一致。 During the summer, they have to pac...