科学家说，如果鲨鱼灭绝，就会象“打地鼠”游戏一样引发食物链的崩溃。
If sharks die off, you could have a food chain Whac-a-Mole, scientists say.
鲨鱼 ：如果它试图从你的船里抓出矮胖的人，用船桨或撑篙打它。
Sharks: If it's trying to take chunks out of your boat, hit it with a paddle or a pole.
如果说eBay是大海里的鲨鱼，我就是长江里的扬子鳄。在海里打，我输；在河里打，他输。
If we fight in the ocean, we lose — but if we fight in the river, we win.
如果说eBay是大海里的鲨鱼，我就是长江里的扬子鳄。在海里打，我输；在河里打，他输。
If we fight in the ocean, we lose — but if we fight in the river, we win.
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