n.a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session
同义词：praesidium
英汉双解大词典
presidiumTEM8(alsopraesidium)
1.
N（名词）
(in Communist countries) a permanent committee of a larger body, such as a legislature, that acts for it when it is in recess (在共产主义国家中)常务委员会