我们就未来的计划进行了一次有意义的讨论。

We had a ___meaningful discussion about our future plans.

志愿活动可以是一次非常有意义的经历。

Volunteering can be a very ___meaningful experience.

首先，我认为这次夏令营对孩子们来说会非常有意义。

First of all, I think this camp could be very ___meaningful for children.