左支臂和右支臂可通过外齿咬合使其实现展开或闭合的动作。
The left and the right supporting arms can engage with each other through external teeth in order to realize the movement of opening and closing.
2008年的研究表示巨齿鲨的咬合力空前绝后——强大到甚至可以粉碎一辆汽车。
A 2008 study found that the megalodon shark had the most powerful bite of any known creature that ever lived-strong enough to crush a small car.
牙齿形状好，强壮的颌，完美的规则的剪刀状咬合，比如上齿紧紧覆盖下齿在口中构成三角形。
Teeth of good size. Jaws strong with a perfect, regular and complete scissor bite, i. e. upper teeth closely overlapping lower teeth and set square to the jaws.
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