white charcoal的用法和樣例：
例句
- A new approach for production of inorganic fluoride compound and silica white is described.
介紹一種無機氟化合物和白炭黑生產的新方法。 - Our county is in great need of high-grade white carbon black and nanometre silica products.At present, the products are imported.
我國對高檔白炭黑和納米級二氧化硅產品需求量大，目前主要依靠進口此項目產品。
