backbone به انگلیسی
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From Longman Dictionary
back‧bone /ˈbækbəʊn $ -boʊn/ ●○○ noun
the row of connected bones that go down the middle of your back
courage and determination
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Example
This, at least, is some suggestion of a backbone, but the larva does not keep it for very long
But they and other progressives had both the brass and backbone to make themselves heard
This effectively creates a limited number of entry points into the backbone and simplifies network management