Wearing footwear first became important from functional point of view as it can protect the feet from cuts, bruises, heat, cold, etc.
穿鞋开始变得重要首先是鉴于其功能性：鞋能保护我们的脚，以防划伤、撞伤、烫伤、冻伤等等。
For instance, black current, grapes, lemon, squash, almonds, ostrich, cold water fish etc. are very good source for good eyesight.
如，黑加仑、葡萄、柠檬、南瓜、杏仁、鸵鸟、深海鱼等，都是非常有益视力的食物源。
Visit museums, art galleries, astronomy observatories, food-making facilities (e.g., chocolate, cheese, etc.), and while away the cold hours in their heated rooms learning something new.
去参观博物馆，画廊，天文台，食品厂（尤其是巧克力奶酪制品厂），在他们暖和的房间里消磨寒冷的时光的同时还能学到一些新知识。
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