So, the first one, we'll start with an iron jaw.

所以，第一个，我们将从铁颚开始。

The iron jaws snap shut and the live crab is hauled aboard and dropped in the fish-box in the boat.

铁钳合上，活蟹被拖上船， 放入船上的鱼箱中。

The expert lowers cautiously a pair of crab-claws--open-springed iron jaws at the end of a twelve-foot pole--and strikes the crab dexterously.

专家小心翼翼地放下一对蟹钳——一根十二英尺长的杆子末端有张开弹簧的铁爪——灵巧地击打螃蟹。