Polemological
a. 研究战争的,战争学的
🗣️ 情景例句
I have worked hard at my major subject.
我对主修课特别用功。
Oh! I'm sorry. I wish you could stay.
哦，真遗憾，要是你能多呆一会儿该多好。
It's a bike.
一辆自行车。