Hitec
硝酸钾、硝酸钠、亚硝酸混合物
🗣️ 情景例句
What power options are available? ( steering, brakes, windows.... )
（这种汽车）有中控系统吗？
I wonder how many girl friends he's got.
我不知道他有多少女朋友。
Then she had an idea.
后来她有了一个主意。