meaning of 'separate but complementary needs'

[Learning_English]

My family and my job both play an important part in my life, fulfilling separate but complementary needs.

Please explain the bold group of words.
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Please let me know if I have made any mistakes in any of my sentences.

[Diverhank]

Complementary in this context means "mutually supplying each other's lack", according to Merriam Webster online. In this sentence, the person needs two separate things that make him happy, his family and his job. If he only had one, he would not have been as happy.