详细解释:a. 不能的, 不会的
【法】 无能力的, 无资格的, 没有办法的
英语解释：
形容词 unable:
(usually followed by `to') not having the necessary means or skill or know-how(usually followed by `to') lacking necessary physical or mental abilitylacking in power or forcefulness同义词：ineffective, ineffectual