2 sentences

1. 他正在攻读有关化学动力学领域的博士学位。

   tā zhèng​zài gōng​dú yǒu​guān huà​xué dòng​lì​xué lǐng​yù de bó​shì xué​wèi.

   He is currently pursuing a PhD in the field of chemical kinetics.

   Source: Dong Chinese Dictionary

2. 我们可以利用动力学原理来分析这个物体的运动趋势。

   wǒ​men kě​yǐ lì​yòng dòng​lì​xué yuán​lǐ lái fēn​xī zhè​ge wù​tǐ de yùn​dòng qū​shì.

   We can use the principles of dynamics to analyze the motion trends of this object.

   Source: Dong Chinese Dictionary