ad in的用法和樣例：
例句
- A material added in small amounts during a chemical or metallurgical process to absorb impurities.
吸氣劑以少量加入化學或冶金過程中用來吸收雜質的物質 - A substance, such as boron, added in small amounts to a pure semiconductor material to alter its conductive properties for use in transistors and diodes.
摻雜質，摻質劑加入純半導體材料中的少量硼等物質，用於晶體管和二極體中以改變半導體的導電率
