作为标语,地道的说法是
Always imitated, never surpassed!
关键词imitate:模仿surpasse:超越
Be imitated all the time,but never be surpassed!
还有
Always be imitated, never be surpassed!
Imitated though, surpassed by none.
符合原文对仗工整的要求,并且,暗含了“尽管”的意味,后半句有“天下无双”的气概
Always be imitated, but never surpassed. 更地道
Have always been copy, have never be surmount!