a small, round close-fitting hat 无檐小便帽 
If you’re after a simple, stylish beanie to keep you warm this winter, then this is the one for you. 如果您正在寻找一种简单时尚的无檐小便帽，以在这个冬天保持温暖，那么这就是适合您的一款。
Word Origin1940s (originally US): perhaps from bean (in the sense ‘head’) + -ie.
