crumbliness
/krʌmblɪ'nəs/[uncountable] the quality of being easily broken into small pieces易碎性
noun [抽象名词] 破碎性
So although old people tend to be less healthy than younger ones, their cheerfulness may help counteract their crumbliness. 因此，尽管老人们的健康状况往往低于年轻人，他们的快乐可能帮助抵消他们的弱项。
