三趾树懒和二趾树懒的区别是它要多一根脚趾。
The three-toed sloth is different from the two-toed sloth in that it has one more finger.
在北京动物园的美国动物展区有几只二趾树懒，在最近这段日子里非常受欢迎。
At Beijing Zoo, the American animal enclosure, which has several two-toed sloths, has been very popular in recent days.
在北京动物园的美国动物展区有几只二趾树懒，在最近这段日子里非常受欢迎。
At Beijing Zoo, the American animal enclosure, which has several two-toed sloths, has been very popular in recent days.
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