But these highly intelligent animals, 然而这些高度智慧的动物
And, worse, these newcomers grow so rapidly 更糟糕的是 这些外来品种生长速度过快
these eucalypts are unable to build relationships with most of the native plants and animals. 无法与当地大多数动植物建立联系
Every one of these trees is, in itself, 每一棵树本身
At the heart of these many connections 而依存关系的中心
are returning to these streams to breed. 洄游至这些溪流以繁殖
Until recently, these were among the least known of forests. 直到最近 这些森林还不为人所知
Most of these messages we can only hear by using special microphones. 大部分信号我们只能通过特殊麦克风听到