In other words / that is to say (换言之 / 也就是说)

Structure Statement。换言之 / 也就是说，paraphrase or logical consequence

换言之 (huàn yán zhī) and 也就是说 (yě jiùshì shuō) introduce a REFORMULATION: they restate what came before in other words, or draw out its logical consequence (他没有反对，换言之，他默许了). 换言之, literally 'changing the words', is the most cultivated and concise, at home in essays; 也就是说 ('that is to say') is neutral and works in careful speech too; 换句话说 ('to put it another way') sits between them. They serve to clarify, sharpen, or spell out the implication of what was said.

Examples

他tā没méi有yǒu反fǎn对duì，换huàn言yán之zhī，他tā已yǐ经jīng默mò许xǔ了le。
He didn't object; in other words, he had already tacitly assented.
需xū求qiú大dà于yú供gōng给jǐ，换huàn言yán之zhī，价jià格gé势shì必bì上shàng涨zhǎng。
Demand exceeds supply; in other words, the price is bound to rise.
他tā三sān天tiān没méi回huí消xiāo息xī，也yě就jiù是shì说shuō，这zhè件jiàn事shì已yǐ经jīng没méi戏xì了le。
He hasn't replied in three days; that is to say, this matter is already a lost cause.
投tóu票piào率lǜ不bù足zú半bàn数shù，换huàn言yán之zhī，结jié果guǒ缺quē乏fá足zú够gòu的de代dài表biǎo性xìng。
Turnout fell short of half; in other words, the result lacks sufficient representativeness.

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