sandwich generation的用法和樣例：
例句
- The sandwich generation, like the design of the sandwich, consists of middle-aged people who must care for their elderly parents and their growing children at the same time.
如同三明治的設計，「三明治一代」主要是指中年人，他們既要贍養老人,又要撫養下一代。 - The sandwich generation is under significant financial and emotional stress.
三明治一代背負著巨大的經濟和精神壓力。
