Chelsea were ‘mentality monsters’ – now their killer instinct has vanished

切尔西曾是“意志怪兽”，如今杀手本能却消失了

正文围绕“切尔西失去曾经的杀手本能”展开，案例、机制或事实线索完整，适合作为对应主题的阅读材料。