点击下方单词,选择对的这个单词
形容词
1. (常指因年迈而)体弱的,虚弱的A person who is infirm is weak or ill, and usually old.
形容词weakfeeblefrailunsoundunstablesickly
形容词firm
多通过句子记忆单词,而不是单独死记硬背。