Exercising
v. 锻炼, 训练, 练习( exercise的现在分词 ); 锻炼（身体某部位）; 使焦虑; 发挥（作用）
✅ 同义词
🗣️ 情景例句
Hello, Mrs. Herrera. Hi, Carl, how you doing?
你好，Herrera太太，嗨，Carl，你怎么样啦？
The homework took me a whole day.
做家庭作业花了我一整天的时间。
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，