They swallow stones which break the food into very small pieces in their stomachs.
它们吞下石头，这些石头在它们的胃里把食物碎成非常小的碎片。
If you allow a dog to play with a ball that is too small he could easily swallow it.
如果你让小狗玩的球太小了，它就可能很容易就把球给吞了。
If you allow a dog to play with a ball that is too small he could easily swallow it.
如果你让小狗玩的球太小了，它就可能很容易就把球给吞了。
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