他们的友谊是持久的。

Theirs was a ___long-lasting friendship.

具有这些品质的人最能提供我喜欢的东西：乐趣、关注、良好的对话和持久的关系。

People with these qualities are most able to provide me with what I like: fun, attention, good conversations and ___long-lasting relationships.

气候变化的效应可能对生态系统产生持久的影响。

The effects of climate change could have ___long-lasting impacts on the ecosystem.