Invalidity
n. 无效, 无价值, 病弱\\n[医] 病废, 劳动能力丧失
📖 牛津释义
invalidity
n[U]
state of being invalid 无根据; 无道理; 无用; 无效
the invalidity of his passport 他的护照之无效.
🗣️ 情景例句
Don't call my cell phone while I'm on vacation.
我在度假的时候别打我的移动电话。
Which speech are you going to listen to this afternoon?
今天下午你准备去听哪个报告?
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