4 sentences

1. 工人们正在疏通堵塞的河道。

   gōng​rén men zhèng​zài shū​tōng dǔ​sè de hé​dào.

   Workers are dredging the blocked river channel.

   Source: Dong Chinese Dictionary

2. 针灸可以帮助疏通人体的经络。

   zhēn​jiǔ kě​yǐ bāng​zhù shū​tōng rén​tǐ de jīng luò.

   Acupuncture can help unblock the body's meridians.

   Source: Dong Chinese Dictionary

3. 经过多方疏通，这个项目终于获批了。

   jīng​guò duō​fāng shū​tōng, zhè​gè xiàng​mù zhōng​yú huò pī le.

   After pulling various strings, the project was finally approved.

   Source: Dong Chinese Dictionary

4. 这位学者对古典文献中的晦涩词句进行了疏通。

   zhè wèi xué​zhě duì gǔ​diǎn wén​xiàn zhōng de huì​sè cí​jù jìn​xíng le shū​tōng.

   The scholar provided annotations and explanations for the obscure phrases in the classical texts.

   Source: Dong Chinese Dictionary