If anything sours the relationship, it is likely to be real differences in their world-views.如果有什么东西能够破坏这种关系的话，那可能就是他们世界观方面存在的实质性差异。General business sours and car sales dip.商业普遍不景气，汽车销售额下降。Milk sours in hot weather.牛奶在热天会变酸。Milk sours quickly in hot weather.牛奶在热天会很快酸败。