只有当狮子和老虎年老体衰到不能捕捉到像鹿和其他小动物这些日常食物时，它们才会咬死并吃掉人。

Lions and tigers only kill and eat men when they have grown too old and too weak to catch their usual food, such as deer and other small animals.

youdao

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".

youdao

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".

youdao