The Bohai Sea is China's continentalsea, while the Yellow, East China and South China seas are marginal seas of the Pacific Ocean.
渤海为中国的内海，黄海、东海和南海是太平洋的边缘海。
2
He theorized that with the use of watercraft, people gradually colonized unglaciated refuges and areas along the continental shelf exposed by the lower sea level.
他的理论是，随着船只的使用，人们沿着因海平面下降而暴露的大陆架逐渐移居到未冻结成冰的区域。
3
Lowered sea levels exposed the shallow continental shelf beneath the Bering Sea.