All the left bank of the river Oka is covered with a dense forest. In the 60s of the XIXth century one Russian professor Kaufman took notice of a strange transitional nature in this place.

欧卡河的左岸遍布着茂密的森林，19世纪60年代一位名为考夫曼的俄罗斯教授在此注意到一种奇怪的变迁性物种。

youdao

All the left bank of the river Oka is covered with a dense forest. In the 60s of the XIXth century one Russian professor Kaufman took notice of a strange transitional nature in this place.

欧卡河的左岸遍布着茂密的森林，19世纪60年代一位名为考夫曼的俄罗斯教授在此注意到一种奇怪的变迁性物种。

youdao