Quadrivalence
n. 四價\\n[醫] 四價
??? 情景例句
Keep trying! don't give up the ship.
繼續努力！ 別輕易放棄！
Rain before seven; fine before eleven.
雨過天晴。
We'll sign two originals, each in Chinese and English language.
我們將要用中文和英語分別簽署兩份原件。