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When it dives, its heart slows to half its normal speed.
当它潜水的时候，它的心脏跳速可以变慢到正常速度的一半。
youdao
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When it dives, its heart slows to half its normal speed.
当它潜水时，它的心跳速度就能减慢到正常心跳的一半。
youdao
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When it dives, its heart slows to half its normal speed.
当它潜水时，它的心跳速度就能减慢到正常心跳的一半。
youdao