unknown quantity編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看unknown quantityunknown quantity — 名詞名詞1. someone or something whose abilities or character are not yet known1.名詞釋義未知數someone or something whose abilities or character are not yet known例句The new player is an unknown quantity, so it's hard to predict how well he will perform.