Steepened
v. （使）变得陡峭( steepen的过去式和过去分词 )
🗣️ 情景例句
I happened to over hear what he said.
我碰巧听到了他所说的话。
The student is busy studying math.
这个学生忙于研究数学。
What are you doing this evening?
今晚你打算干什么？