The parties often based on the substantive cause claiming treaty is invalid.
实质原因是导致条约无效的主要原因。 缔约主体主张条约无效时,往往是基于实质原因。
参考来源 - 条约无效的实质原因研究On condition that conventional methods are invalid, new methods are need.
不过在利用常规途径理解系统无效的前提下，就需探讨新的系统理解方法。
参考来源 - 软件再工程理论应用与研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： shut-in
同义词： disable incapacitate handicap
"invalid reasoning"; "an invalid driver's license"
"the license is invalid"
以上来源于: WordNet
名词读作ˈɪnvəlɪd。形容词读作ɪnˈvælɪd且连字符添加方式为 in+val+id。
N-COUNT An invalid is someone who needs to be cared for because they have an illness or disability. 病人; 残疾人
I hate being treated as an invalid.
我讨厌被当作病人对待。
ADJ If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule. 无效的
The trial was stopped and the results declared invalid.
审判被终止了，其结果被宣布无效。
ADJ An invalid argument or conclusion is wrong because it is based on a mistake. 站不住脚的
We think that those arguments are rendered invalid by the facts.
我们认为那些论点在事实面前站不住脚。
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