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螃蟹的眼睛长在细长的眼柄上，可以360度旋转，让它们在不动身体的情况下看到周围的一切。Crabs have eyes on long stalks that can rotate 360 degrees, allowing them to see everything around them without moving their bodies.
大多数螃蟹会横着走路，因为它们的腿关节只能水平移动，这也是为什么它们总是侧身移动的原因。Most crabs walk sideways because their leg joints only allow horizontal movement, which is why they always seem to scuttle sideways.
螃蟹的壳每年都会脱落并重新长出一个更大的壳，这个过程叫做蜕壳，是它们成长的一部分。Crabs shed their shells and grow new, larger ones each year in a process called molting, which is part of their growth cycle.
螃蟹的胃里有一种“胃磨”，类似于小石块的结构，帮助它们磨碎食物。Crabs have a "gastric mill" in their stomachs, a structure similar to small stones, which helps them grind up their food.
螃蟹会用它们的钳子来交流，敲击地面或挥舞钳子来发出信号，这种行为在求偶时尤其常见。Crabs use their claws to communicate, either by tapping the ground or waving them to signal others, especially during courtship.
有些螃蟹种类能够在水中和陆地上呼吸，它们的鳃可以在空气中吸收氧气，这使它们能够在潮湿的环境中生存。Some species of crabs can breathe both in water and on land; their gills can absorb oxygen from the air, allowing them to survive in moist environments.
螃蟹的钳子可以再生，如果一只钳子被折断，它们可以在下一次蜕壳时长出一只新的。Crabs can regenerate their claws; if a claw is broken off, they can grow a new one during their next molting cycle.
螃蟹的壳表面布满了感受器，可以感知触觉、化学物质和水流的变化，帮助它们探测周围环境。A crab's shell is covered with sensors that can detect touch, chemicals, and changes in water flow, helping them sense their environment.
螃蟹有一种特殊的“舞蹈”叫做摆尾舞，是在求偶季节用来吸引异性注意的。Crabs perform a special "dance" called the tail-flick dance during mating season to attract the attention of potential mates.
螃蟹的血液是蓝色的，这是因为它们的血液中含有铜元素，而不是像人类一样含有铁元素。Crab blood is blue because it contains copper instead of iron, which is found in human blood.
螃蟹有两个胃，一个用于储存食物，另一个用于消化，这让它们能够分解各种复杂的食物。Crabs have two stomachs, one for storing food and another for digesting it, allowing them to break down a variety of complex foods.
螃蟹的腿和钳子由关节连接，类似于人类的肘部和膝盖，这让它们能够灵活地抓取和移动。A crab's legs and claws are connected by joints similar to human elbows and knees, allowing them to grasp and move with flexibility.
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