Fast Times at Ridgemont High (1982)
https://www.imdb.com/title/tt0083929
The network TV broadcast version of Fast Times at Ridgemont High used an alternate take of the pool scene to censor the nudity.
Theatrical Version: Phoebe Cates' character, Linda Barrett, unfastens her red bikini top, fully exposing her breasts.
Network TV Version: An alternate shot was used where Cates unfastens her top but holds it against her chest to conceal her breasts.