1. 残余物：relic structure 残余构造 | relict 残余物 | relief 地势
2. 残遗物：relic vegetation 残遗植被 | relict 残遗物 | relict ecotype 残遗生态型
3. 残余：relict texture 残余结构 | relict 残余 | reliction 海退
relict的解释
noun
1. geological feature that is a remnant of a pre-existing formation after other parts have disappeared
2. an organism or species surviving as a remnant of an otherwise extinct flora or fauna in an environment much changed from that in which it originated