They do not own the land in perpetuity.
他们并
是永久拥有这片土地。
;永远
;
可改变的, 可反转的;地;
今
后, 
后;They do not own the land in perpetuity.
他们并是永久拥有这片土地。
The plots where they were buried were dedicated in perpetuity to the United States.
埋葬他们的那几块墓地已永远奉献给了美国。
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