extension是什么意思(extension的用法)
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一、extension是什么意思
1、extension 扩大,延长
2、来自extend, 延长。
二、extension的用法
1、extension (n.)
2、c. 1400, "swelling, bulging," from Latin extensionem/extentionem (nominative extensio/extentio) "a stretching out, extension," noun of action from past participle stem of extendere (see extend). In a concrete sense, "extended portion of something" (a railroad, etc.), from 1852. Telephone sense is from 1906.
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