2 sentences

1. 他为这个专题查阅了大量资料。

   tā wèi zhè​ge zhuān​tí chá​yuè le dà​liàng zī​liào.

   He consulted a large amount of material for this special topic.

   Source: Dong Chinese Dictionary

2. 电视台制作了一个关于气候变化的专题。

   diàn​shì​tái zhì​zuò le yī gè guān​yú qì​hòu biàn​huà de zhuān​tí.

   The television station produced a special feature on climate change.

   Source: Dong Chinese Dictionary