2 sentences

1. 天文学家通过复杂的公式推算出日食发生的准确时刻。

   tiān​wén​xué​jiā tōng​guò fù​zá de gōng​shì tuī​suàn chū rì​shí fā​shēng de zhǔn​què shí​kè.

   Astronomers calculated the exact moment of the solar eclipse using complex formulas.

   Source: Dong Chinese Dictionary

2. 根据现有的销售数据，我们可以推算出下一季度的市场需求。

   gēn​jù xiàn​yǒu de xiāo​shòu shù​jù, wǒ​men kě​yǐ tuī​suàn chū xià yī jì​dù de shì​chǎng xū​qiú.

   Based on existing sales data, we can estimate market demand for the next quarter.

   Source: Dong Chinese Dictionary