[bù kě mó miè]
indelible; ineffaceable
everlasting merit; unforgettable meritorious deeds; ineffaceable merit
不可磨灭的功绩
an ever lasting [indelible] contribution
不可磨灭的贡献
indelible impressions
不可磨灭的印象
Although she had only met the old man once， he had made an indelible impression on her.
虽然她和那老人只见过一面， 可却在她心上留下了不可磨灭的深刻印象。