standing chairman的用法和样例：
例句
- Standing chairmen shall be elected by the Presidium to convene and preside over meetings of the Presidium.
主席团推选常务主席若干人，召集并主持主席团会议。 - The managing chairman of the Presidium may hold a meeting to discuss the major special issues of the regulation motions and report the discussion and opinions to the Presidium.
主席团常务主席也可以就法规案中的重大的专门性问题，召集代表团推选的有关代表进行讨论，并将讨论的情况和意见向主席团报告。
