Activity charge
[经] 动态费用
🧩 词语组成解析
🗣️ 情景例句
It's common practice.
这是惯例。
Have you ever thought about becoming a professional musician?
你曾经考虑了成为一个职业的音乐家吗？
Jim is writing. Lily isn't writing. She's looking at the blackboard.
吉姆在写字。莉莉没在写字。她在看黑板。