Nitropolyurethane
硝基聚氨酯
🗣️ 情景例句
Why do prices always go up during Spring Festival?
为什么春节期间很多东西都会涨价？
Please keep the cartons to 15kg each and metal-strap all cartons in stacks of 4.
请将每个纸箱重量限制在15公斤内，并将每4箱一组用铁条儿固定起来。
Do you speak Chinese?
你讲汉语吗？