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The sounds bounce off them and the lower jaw captures the returning sounds, making it possible for the dolphin to sense what's in the surrounding water and decide where to swim.

声音从它们那里折射，下颌捕捉到返回的声音，使海豚能够感受到周围水域中有什么，并决定游向哪里。

youdao

This 3-foot-long croc was a plant - and grub-eater with a pair of buckteeth in the lower jaw it used to dig for food.

这种3英尺长的鳄鱼以植物和幼虫为食，它下颚上长着一对龅牙用来挖掘食物。

youdao

This was found in 1973 and had previously been thought likely to be the lower jaw of rudolfensis.

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It's missing the lower extraction behind the right side canine on the lower jaw, but after that, that's not him.

BBC

His nose had been broken and his mouth was cut at one corner and the line of the scar across the upper lip and lower jaw showed through the growth of beard over his face.

NPR: Robert Jordan, Hemingway's Bipartisan Hero