2 sentences

1. 委员长正在主持会议。

   wěi​yuán​zhǎng zhèng​zài zhǔ​chí huì​yì.

   The chairperson is presiding over the meeting.

   Source: Dong Chinese Dictionary

2. 吴邦国曾任全国人大常委会委员长。

   Wú Bāng​guó céng rèn quán guó rén​dà cháng​wěi​huì wěi​yuán​zhǎng.

   Wu Bangguo once served as the Chairman of the Standing Committee of the National People's Congress.

   Source: Dong Chinese Dictionary