deactivate的解释
摘自21世纪deactivate
vt.
1. 使无效，使失去效果；使失去活力；使停止作用；停止使用(工厂等)
2. 【军事】撤销，遣散(军队、军事单位)；使(一个师、团等)处于瘫痪状态；使复员
3. 断开(或拆除、卸除)(炸弹等)的引信，使(炸弹、炮弹等)不能爆炸
4. 【化学】使(化学品催化剂、神经等)灭活化，使减活化，使钝化
WBD
1 to remove (a group of soldiers) from active service; demobilize:
➾They said they also intend to mothball 375 naval vessels, deactivate three air divisions, cut armaments and military budgets (Time).
2 to make inactive:
➾to deactivate a nerve or a solution.
➾Sleep comes when this waking center is deactivated, probably by enzymes (Time).
3 to stop the use of:
➾to deactivate a factory.
使无效这个翻译，不知道是不是根据make inactive来的。
看上去deactivate的适用范围，似乎比使无效小。
使无效 似乎应该对应 invalidate，make ineffective这种词 多查几个英英字典，大家都说是使无效那就是使无效了。
来自牛9
deactivate something： to make something such as a device or chemical process stop working
Do you know how to deactivate the alarm?
deactivate = de- + activate 与activate构成一对反义词。
同时，activate又是make active的意思。所以词典里用to make inactive解释deactive的方式很常见。
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