n.無力；無效；性無能

Skin, bones and internal organs are used to make traditional medicines touted to cure anything from arthritis to impotency. 皮，骨頭和內(nèi)部器官被用于生產(chǎn)傳統(tǒng)醫(yī)藥用于治療從關節(jié)炎到無力多重疾病。

Increasing use of birth control pills is also contributing towards rising impotency, he said. 他說，性無能人口比例增加的另一個原因是避孕藥的大量使用。