These let you treat each node attribute as if it is a list in those contexts where it would be nice for the attribute to behave like a list.
这两种方法可以让您在属性适合作为列表发挥作用的情况下象对待列表一样对待每个节点属性。
The pigs in the boring environment were pessimistic and, fearing it might be the bag, did not approach for a treat.
而在不好环境中的猪则更加悲观，以为这种声音可能是要来猎捕他们的声音，并不会把这当做一种乐趣。
I can't pay for your dinner as I was in the red for half a year. Perhaps, it will be my treat next time.
因为欠债半年了，所以不能为你付午餐费，也许下次我请客。
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