Arccos
反余弦
🗣️ 情景例句
Once the film stops showing, they won't even remember your name.
一旦你的电影停播了，你也就会很快被人忘记。
When Greek meets Greek, then comes the tug of war.
龙争虎斗。
Instead of becoming a doctor, however, he became a successful writer of detective stories.
然而，他后来没当上医生，却成了一位成功的侦探小说作家。