详细解释:a. 两国联合共管区的
英语解释：
形容词 bizonal:
relating to or concerned with the combined affairs of two administrative zones详细解释：
bi.zon.al
adj.（形容词）Of or relating to the affairs of a zone under the joint administration of two powers.两国联合共管区的：两方联合管理区域的事物的，有关于两国联合共管区的