cession/ˈseʃn; `sɛʃən/ n(fml 文)(a) [U] action of ceding sth, esp land or rights 让与或割让某事物（尤指土地或权利）.(b) [C] thing that is ceded, esp land 被割让的事物（尤指土地）.
牛津英汉双解词典