they are much cheaper meaning in English

布面或皮面精装的书籍那么经久耐用

Tom runs a pre - loved clothing shop . the dresses he sells are all designer clothes , but they are much cheaper than they would be if they were new
汤姆经营一家二手服装店，卖的都是名牌服装，但价格却远远低于新货价格。
And even if the prices of chinese goods rise , they could still dampen inflation in richer economies , because they are much cheaper than domestically produced equivalents and are gaining market share
并且即使中国商品价格上升，其仍能舒缓富庶经济体的通货膨胀，因为它们要比其国内的同类产品便宜很多并且市场份额在扩大。