Definition
This idiom describes someone who consistently finds themselves in a supporting role, never achieving primary importance or recognition.
永远都是女孪，永远无法成为新娘（指永远都是配角）
She has always felt like 'always a bridesmaid, never the bride,' watching her friends achieve continuous success in their careers.
她一直觉得自己是『永远的伴娘，从未成为新娘』，看着朋友们在事业上不断取得成功。
In every team project, he's always the one doing most of the work, yet never getting the credit; truly 'always a bridesmaid, never the bride'.
在每个团队项目中，他总是做大部分工作，却从未得到应有的赞誉；真是『永远的伴娘，从未成为新娘』。
She's been to five award ceremonies, nominated each time, but never won. She's starting to feel like 'always a bridesmaid, never the bride'.
她参加了五次颁奖典礼，每次都获得提名，但从未获奖。她开始觉得自己是『永远的伴娘，从未成为新娘』。