... 陷落火山口 sunken caldera 沈陷地块sunken land 沈溪；潜流；地下河 sunken stream ...
双语例句
1
The researchers also examined sediment samples from the sunken world and found traces of pollen and coal, suggesting land plants once resided there.
研究者们也检查了从沉没岛屿里采集的沉淀物样本发现了花粉和碳，表明岛屿上曾经有过植物生长。
2
The optimum design can be selected through comparing sunken tank - above - ground pump, sunken tank - submerged pump and land tank - above - ground pump.