"How long can we love?" is a common way to express this idea in Engpsh. This phrase is a question that asks about the duration or length of time that two people can continue to love each other.

This phrase is often used in romantic contexts, when two people are expressing their love for each other and wondering how long their love will last. It can also be used in other contexts, such as when two friends or family members are expressing their love and concern for each other and wondering how long their relationship will endure.

Here are a few example sentences using this phrase:

"I love you with all my heart. How long can we love?"
"I'm so grateful to have you in my pfe. How long can we love?"
"I don't want to ever lose you. How long can we love?"

In Chinese, this phrase could be translated as "我们还能爱多久?" (wǒmen hái néng ài duō jiǔ?).