Examples
gōng huì工会cān jiā参加le了shì wēi示威yóu xíng游行ma吗？
工会参加了示威游行吗？
Did the union participate in the demonstration?
工会和企业一致同意了一份新的合同。
The union and the company have agreed upon a new contract.
在沃尔玛建立工会和在梵蒂冈建立无神论俱乐部一样容易。
It's about as easy to start a union in a Walmart as it is to start an atheist club in the Vatican.