union tag的意思|示意

I have a number of entities (different kinds of tags e. g. location, events etc) and I want data for a table view that shows "all tags" (i. e. the union of all tag entities).

我有一些实体(不同种类的标签，例如位置，事件等)，我想要一个表视图的数据，显示“所有标签”(即所有标签实体的联合)。

In exchange, he guarantees an above-market price for each animal and a calf-to-customer electronic ear tag ID system like that used in the European Union.

作为交换，他向客户保证以高于市场的价格收购每一头动物，并为牛崽提供与欧盟类似的直达客户电子耳标身份识别系统。