“swimming bladder”可以造什么句,swimming bladder造句
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1、A fish has a swimming bladder inside it—that is, a sack containing it wants to dive deep down and stay down, it squeezes out some of the air and lets in water.
1、A fish has a swimming bladder inside it—that is, a sack containing it wants to dive deep down and stay down, it squeezes out some of the air and lets in water.