The use of root systems of an old tree gave the otter a place to play as well as increasing the naturalization.

他们还利用一棵老树的树根，为水獭营造出一个可以嬉戏的环境。

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The use of root systems of an old tree gave the otter a place to play as well as increasing the naturalization.

他们还利用一棵老树的树根，为水獭营造出一个可以嬉戏的环境。

youdao