The synchronic differences of languages usually indicates the diachronic evolution of the language.
语言的共时差异往往反映历时的演变。
Synchronic differences in language often reflect the diachronic evolution, so do the endangered languages.
语言的共时差异往往反映历时的演变，濒危语言也是一样。
The paper is a descriptive synchronic study on the differences between English and Chinese in terms of reference.
本文是对英语和汉语在照应方面的差异的描述性共时研究。
He not only paid close attention to different cultural forms in different district and different historical period, but also studied these differences from synchronic and diachronic angles.
他不但关注不同地域和不同历史时期的文化形态的差异，而且从共时和历时的角度对其不同之处进行了研究。
He not only paid close attention to different cultural forms in different district and different historical period, but also studied these differences from synchronic and diachronic angles.
他不但关注不同地域和不同历史时期的文化形态的差异，而且从共时和历时的角度对其不同之处进行了研究。
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