Hitec
硝酸钾、硝酸钠、亚硝酸混合物
🗣️ 情景例句
She has the ability to speak English fluently.
她能够流利地说英语。
I really don't know.
我真不知道。
The garden was soon littered with chunks of metal which had once made up a lawn mower.
一会儿工夫，割草机便被拆成一个个金属零件，乱七八糟地堆在花园里。