Definition
to begin participating in an ongoing activity to gain an advantage.
中途加入参加（以获取好处）
Their startup project is taking off quickly, so I decided to get in on it too.
他们的初创项目正在迅速起飞，所以我决定也加入其中。
When she heard about the potential profits of the project, she immediately wanted to get in on it.
当她听说这个项目的潜在利润时，她立即想要加入。
I hope to get in on this team because I’ve been impressed by everyone’s collaboration.
我希望加入这个团队，因为我被大家的合作所打动。