- buried relief
- buriedrelief
- 潜: go underwater; hide under wa ...
- 起伏: rise and fall; ups and downs ...
- 半潜起重船: semi-submerged derrick barge
- 起伏: rise and fall; ups and downs; heave rolling; undulate; fluctuate 起伏不平的地形 a wavy terrain; 起伏的波涛 theheaving billows; 关系起伏 ebb and flow of the relations; ups and downs in the relations; 山峦起伏。 the mountain ranges rise and fall
- 波动，起伏: fluctuate v. vary from one form or state to another; fluctuation
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