Inconvertibility
n. 不能变换, 不能兑换\\n[经] 不兑换, 不可兑换
🗣️ 情景例句
But don't give up.
但是千万不要放弃。
I know the boy whose father is a policeman.
我知道那个男孩的父亲是警察。
I gave up in despair.
我无可奈何，只好罢休。