使用大量填充物——DIY商店里的泡沫管覆盖膜是保护自行车车身的绝佳物，而且非常便宜。
Use lots of padding - foam pipe cladding from a DIY shop is perfect for protecting your frame and very cheap.
在亚洲的一些城市里，到处可见加工食品和富含糖和饱和脂肪的快餐，而且非常便宜。
In Asian cities, processed foods and fast foods rich with sugar and saturated fats are often the most available and the cheapest.
书籍能提供非常丰富的知识，而且价格比上一门课要便宜得多。
Books offer an outstanding wealth of learning at a much cheaper price than taking a course.
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