在对比发达的国家是由第三方认证,我国如今没有。
In contrast to developed countries is the third party certification, China is not.
一方在对方履行之前有权拒绝其履行要求。
Either party may, prior to the other party's performance, reject the other party's demand for performance.
一方在对方履行之前有权拒绝其履行要求。
Either party may, prior to the other party's performance, reject the other party's demand for performance.
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