The problem was rendered extremely difficult by the extraordinary inertness of the nitrogen, which refuses to combine even with oxygen. 由于氮極大的惰性，不能與氧結合，所以這個問題被渲染得過分困難。
ZnO shows good chemical inertness and bio-compatibility.Also, ZnO is the only material which possesses good piezoelectric and semiconductor properties. 摘要氧化鋅具有良好的化學惰性和生物兼容性，也是目前同時具有壓電性質和半導體性質的唯一材料。