Timken
n. 铬镍钼耐热钢
🗣️ 情景例句
To teach a fish how to swim.
孔子面前读诗书，班门弄斧。
In vain.
白忙一场。
She got to school early. She had a little rest after lunch, but she worked hard in class all day.
她早早来到了学校。午饭后她小休一会儿，但一整天她在课堂上都很用功。