ratio design的用法和樣例：
例句
- The characteristics and mixture ratio design of the polypropylene fiber shotcrete are introduced.
摘要介紹了聚丙烯纖維噴射混凝土的特點及其配合比設計。 - The paper mainly discussed the process of flyash concrete mix design and the application to Zhangshi Expressway bridge construction.
重點探討粉煤灰混凝土配合比的設計過程及在張石高速公路橋樑施工中的應用。
