But summer is short. 但是夏天很短暂

133. which might help individuals to avoid a fight.
     或许可以避免个体之间的争斗
134. To best spread their scent,
     为了更好地散布自己的气味
135. they really have to put their back into it.
     他们得用后背好好地蹭一蹭
136. But summer is short.
     但是夏天很短暂
137. Itches satisfactorily scratched,
     痒痒挠满意之后
138. it's time to eat.
     是时候该进食了
139. In a couple of months,
     几个月后

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 136 行