dìzhìxuéjiā / tōngguò / fēnxī / chénjīcéng / pànduàn / zhè / yī / dìqū / céng / fāshēng / guò / hǎiqīn

地质学家通过分析沉积层，判断这一地区曾发生过海侵。

By analyzing sedimentary layers, geologists determined that this area had once experienced a marine transgression.