知道世界上有几种鱼是永远的swimming machines么？
因为他们没有bladder,
所以在他们feeding, courtship, rest期间它们都处于motion状态。
这些鱼包括：
tunas, mackerels and billfishes(marlins, sailfishes and swordfish)
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BEFORE 09'FALL
Make your own Countdown Clocks
GRADUATE THESIS
Make your own Countdown Clocks
BEFORE 10' FALL
Make your own Countdown Clocks
3Q for your care:)
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