a cupid's-bow mouth的用法和样例：
- "Would you like a free calendar?" Her bow mouth turned upward in a grin.
- The ship's bow was blown off by a mine.
- He moved aside for her with a polite bow.
- He tossed the peanuts into his mouth one at a time.
- She poked a toffee into my mouth.
- The girl makes a bow to her teacher.