它们用锋利的牙齿将毒液注入被捕食的昆虫体内。
They use their sharp teeth to force poison into the insects they catch for food.
它们遇到大鱼和海兽，就凶猛地扑上去，用锋利的牙齿咬住，很快就吃掉。
They meet a big fish and marine mammals, will fiercely attack, with sharp teeth to bite, soon.
正在这时，碰巧小老鼠路过这里，看见了狮子所处的悲惨困境。它跑上去，用锋利的小牙齿咬断了绳子，放了狮子。
Just then the little Mouse happened to pass by, and seeing the sad plight, in which the Lion was, went up to him, and with his sharp little teeth gnawed away the ropes, setting the Lion free.
斯科菲尔德博士和他的研究小组用高清显微镜来对比研究室里培养的切叶蚁蚁蛹的牙齿和野外的切叶蚁已经磨损的牙齿。 他们发现蚁蛹的锯片比老龄切叶蚁的锯片锋利340倍。
Dr Schofield and his team used hi-tech microscopes to compare the pristine teeth of laboratory-reared pupae with the worn teeth of the wild forager ants.
狮子用他锋利的牙齿咬大网，但是没有什么用。
The lion bit the net with his sharp teeth, but that did not help.
狮子用他锋利的牙齿咬大网，但是没有什么用。
The lion bit the net with his sharp teeth, but that did not help.
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