second-level domains

listen to the pronunciation of second-level domains
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Определение second-level domains в Английский Язык Английский Язык словарь

second-level domains
plural form of second-level domain
second-level domain
a domain that is immediately below a top-level domain

Wiktionary.org is a second-level domain.

second-level domain
a domain name that contains a single period
second-level domains
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