the state of being weak in health or body (especially from old age)
同义词：infirmity??/??frailty??/??debility??/??feebleness??/??frailness
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。