1 sentence

1. 微积分是理工科学生必须掌握的基础数学工具。

   wēi​jī​fēn shì lǐ​gōng​kē xué​sheng bì​xū zhǎng​wò de jī​chǔ shù​xué gōng​jù.

   Calculus is a fundamental mathematical tool that science and engineering students must master.

   Source: Dong Chinese Dictionary