1 sentence

1. 经过多方调查，相关部门终于查清了事故的原因。

   jīng​guò duō​fāng diào​chá, xiāng​guān bù​mén zhōng​yú chá​qīng le shì​gù de yuán​yīn.

   After an extensive investigation, the relevant authorities finally determined the cause of the accident.

   Source: Dong Chinese Dictionary