brittleadj.易碎的；尖利的；脆弱的n.果仁薄脆糖brittle damage model脆性损伤模型brittle - fracture脆性破坏brittleness function脆性函数Brittleness mechanism脆性机制brittle defensiveness脆弱防御性brittle bone syndrome骨脆综合征Brittleness-keeping保脆brittleness structure脆性相brittle-bone disease骨质疏松症brittle bones/nails易折的骨骼/指甲