A substance added in small amounts to something else to improve, strengthen, or otherwise alter it. 添加劑，添加物少量加入其他物質(zhì)以使其提高、增強或改變的物質(zhì)
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(xué)或冶金過(guò)程中用來(lái)吸收雜質(zhì)的物質(zhì)
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(zhì)，摻質(zhì)劑加入純半導體材料中的少量硼等物質(zhì)，用于晶體管和二極管中以改變半導體的導電率
