be sharp at

• 擅长； 精于

be sharp at的用法和样例：

例句

1. She is good at designing eye-catching packages.
   她擅长设计花俏的包装。
2. Be sure to turn off all the lights when you leave.
   他擅长写作。
3. Tom is a great hand at painting.
   汤姆精于绘画。
4. After reading this book, you will be proficient in writing.
   读完这本书，你会精于写作。