Collins Chinese Dictionary Plus (3rd edition), 2011:
eternal [ɪˈtəːnl]
adj
1
(=everlasting)
[+ youth, life] 永久的 yǒngjiǔ de
[+ youth, life] 永久的 yǒngjiǔ de
2
(=unchanging)
[+ truths, questions, values] 永恒(恆)的 yǒnghéng de
[+ truths, questions, values] 永恒(恆)的 yǒnghéng de