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来源：雅诚德英语网
Explain why crabs and shrimps give out bubbles from their mouths when they are out of water.
试解释当虾和蟹不在水里时，为什么它们的嘴里会吐出泡来？
Explain why crabs and shrimps give out bubbles from their mouths when they are out of water.
试解释当虾和蟹不在水里时，为什么它们的嘴里会吐出泡来？