backout的用法和樣例：
例句
用作名詞 (n.)
- It's important to backout Beijing's wall in the capital's history.
拆除城牆是首都發展史上的重大事件。 - In the total process of the construction project, the risk has an important influence on the life-cycle cost from the decision-making and the running phase to the backout phase.
摘要在建設項目從決策設計到實施運行直到拆除的全過程中，風險對全生命周期的造價影響貫穿其中。
