a manually operated device to correct the operation of an automatic device
the act of nullifying; making null and void; counteracting or overriding the effect or force of something
overridden的用法和樣例：
例句
Considerations of safety override all other concerns. 對安全的考慮壓倒一切。
A particular value for a variable that is assigned automatically by an operating system and remains in effect unless canceled or overridden by the operator. 預設，默認某一變數的特定值，由操作系統自動指定並持續有效，除非操作者取消它或使它無效
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