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English definition of “that is to say ...”

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that is to say ...

or more exactly: Our friends, that is to say our son's friends, will meet us at the airport.
Translations of “that is to say ...”
in Chinese (Traditional) 更確切地講, 也就是說…
in Chinese (Simplified) 更确切地讲, 也就是说…
(Definition of that is to say ... from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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