legacy systems的用法和樣例：
例句
- Ripplebase implements primitive journaling mechanisms to speed queries on slow systems, and is targetted at legacy systems.
它實(shí)現了基本的日記機制來(lái)提高查詢(xún)速度，它適用于遺留系統。 - Legacy system reengineering has already been a very important branch of software engineering.
遺留系統再工程已經(jīng)成為軟件工程領(lǐng)域一個(gè)重要分支。
