trigonometry
n[U]
branch of mathematics dealing with the relationship between the sides and angles of triangles, etc 三角学.
🗣️ 情景例句
How many brothers and sistes do you have?
你有多少个兄弟姐妹?
I ought to tell him the whole story.
我应该告诉他整个事情的始末。
Young men who have reason to fear that they will be killed in battle may justifiably feel bitter in the thought that they have cheated of the best things that life has to offer.