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冰天雪地的南极,水陆交接处全是滑溜溜的冰层,甚至是尖锐的冰凌。当你看见身体笨拙、行动缓慢的企鹅时,你的脑海里是否闪现过这样的疑问:企鹅身躯笨重,没有用来爬行的前臀,也没有飞翔的翅膀,它们又是怎么上岸的呢?告诉你吧:企鹅在准备上岸时,总是猛地低下头,将身体扎入水中,拼力沉潜。潜得越深,海水所产生的浮力就越大。企鹅一直潜到适当的深度,再摆动双足,借助水的浮力迅猛向上,犹如离弦之箭蹿出水面,腾空而起,便能轻巧地完成登陆任务。
The Antarctic ice and snow, land and water junction full of slippery ice, ice or even sharp. When you see a penguin, slow-moving penguin, do you think in your mind: Penguin body bulky, not used to crawl the front buttocks, there is no flying wings, and how they are ashore it? Tell You: penguins ready to go ashore, always suddenly bowed his head, the body into the water, fighting subdued. The deeper the submarine, the greater the buoyancy produced by seawater. Penguins have been dive to the appropriate depth, and then swing feet, with the buoyancy of water rapidly upward, like a rocking arrow 蹿 out of the water, the sky, you can easily accomplish the landing mission.