我不能肯定为什么灰色松鼠仅在林相单一的地方不会逐出红色松鼠-您知道吗？
I am not sure why it is only in pine monoculture that grey squirrels don't drive out the red - do you know.
youdao
一只灰色的松鼠在树枝间跳来跳去。
A grey squirrel is scampering from limb to limb.
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