在民事诉讼中，如果有非正当当事人存在，诉讼将无法继续进行或继续进行也是毫无意义。
If there are unsuitable litigant in civil action, the lawsuit will be unable to continue or it will be meaningless even though it continues.
正当当事人问题是当事人研究中的重要内容，正当当事人的概念与当事人既有区别又有联系。
Proper party is an important part of party research. Proper party concept is related to, meanwhile different from party.
坚持既维护投资人合法权益又防止其滥用诉权的原则，对程序当事人和正当当事人分别进行规范；
Parties in proceedings and proper parties should be appropriately regulated so as to prevent an abuse of rights to an action while, at the same time remain the investors protected.
非正当当事人更换理论，是非正当当事人理论的伴生物，它不但具有重要的理论价值，而且具有重要的实践意义。
The theory of unsuitable litigant alteration, which is accompanied with the theory of unsuitable litigant, has not only an important theoretic value, but also an important practical significance.
非正当当事人更换理论，是非正当当事人理论的伴生物，它不但具有重要的理论价值，而且具有重要的实践意义。
The theory of unsuitable litigant alteration, which is accompanied with the theory of unsuitable litigant, has not only an important theoretic value, but also an important practical significance.
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