a topless swimsuit的用法和样例：
- We're on a topless beach,for God's sake,he put it to an invisible judge.
- Zhang was caught sunbathing on a beach in a topless bikini with her multi-millionaire boyfriend.
- As she could not afford her tuition, she became a topless model for the magazine "Page Three" and was called Ireland's brainiest glamour model.
- There is a vein of melancholy in his character.