平
平 – Ping2 – Flat, Level, Even, Peaceful
平行 – Ping2 Xing2 – Even Line — Parallel
宇宙 – Yu3 Zhou4 – Universe
平行宇宙 – Ping2 Xing2 Yu3 Zhou4 – Parallel Universe
I really wanted to find out how to say “Tholian” in Chinese but was thwarted! I can give you this list of Star Trek episode titles in Chinese, to go along with the Japanese ones from a while ago instead.