adj.無效的；病弱的
n.病人；殘疾者
vt.退役；遣送回家
A passport that is out of date is invalid. 護(hù)照過期是無效的。
Unless a check is signed, it is invalid. 支票除非簽了名，否則是無效的。
She looks after her invalid mother. 她照看病弱的母親。
用作名詞 (n.)Nobody looks after the invalid. 沒人照顧這個(gè)病人。
用作及物動(dòng)詞 (vt.)He was invalided out of the army because of the wounds he received. 他因負(fù)傷而退役。
Ambassador decided that he must invalid his sick radio-officer home. 大使決定把患病的無線電報(bào)員遣送回國。
vt.使無效；使作廢
vt.使無效；使作廢
n.無效；無價(jià)值；病弱
n.無效；失效
