投标有效性 meaning in English

bid availability
validity of tenders

But in recent years , bid exposes a lot of questions , various kinds of incidents in violation of rules and regulations emerge in an endless stream ) rent - seeking take place frequently , these phenomena have hindered the further improvement which give full play to bid validity to a certain extent
但近年来，招投标也暴露出很多的问题，各种违规事件层出不穷，寻租活动频发，这些现象在某种程度上阻碍了招投标有效性的充分发挥。