两者都是必不可少的，没有一个是优于另一个的；它们互不冲突反而相辅相成，各有其本身的职权范围。
Both were essential and neither was superior to the other; they were not in conflict but complementary, each with its own sphere of competence.
安置单分子并将其呈球面对称放置对于生命来说必不可少，这也能让研究者对两者进行更深入研究。
Placing a molecule that's essential to life within a spherically symmetrical one could let researchers learn more about each.
千万不要后悔你人生中的哪一天，好日子带给你幸福，坏日子带给你经验，两者都是人生必不可少的。
Good days can give your happiness while bad days can fetch you experience. Both good days and bad days are indispensable in our lives.
两者是实地勘验必不可少的手段，都是为实现有效的现场勘验服务的。
Both of them are absolutely necessary in on-the-spot investigation, serving the realization of effective field inspection.
两者是实地勘验必不可少的手段，都是为实现有效的现场勘验服务的。
Both of them are absolutely necessary in on-the-spot investigation, serving the realization of effective field inspection.
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