Duōnián bújiàn, liǎng rén zhījiān biàn de yǒuxiē shēngshū.
After not seeing each other for years, the two of them became somewhat distant.
Tips
usage
生疏 covers two related meanings: (1) rusty/out of practice with a skill, and (2) distant/unfamiliar in a relationship. Both share the idea of something that was once close or familiar fading with time.
