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。
Medicine ancient book record "foot of the person, if root of the tree, the tree dry root uses up first, the person old foot fades first".
医学典籍记载“人之脚，如树之根，树枯根先竭，人老脚先衰”。
Medicine ancient book record "foot of the person, if root of the tree, the tree dry root uses up first, the person old foot fades first".
医学典籍记载“人之脚，如树之根，树枯根先竭，人老脚先衰”。
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