同期 (tóng qī) means “the corresponding time period (in a different year etc); concurrent; synchronous”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
销售额比去年同期增长百分之十。
Xiāoshòu'é bǐ qùnián tóngqī zēngzhǎng bǎi fēn zhī shí.
Sales grew ten percent compared to the same period last year.
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