a narrow sea passage which separates the eastern tip of Siberia from Alaska and links the Arctic Ocean with the Bering Sea, about 85 km (53 miles) wide at its narrowest point. During the Ice Age, as a result of a drop in sea levels, the Bering land bridge formed between the two continents, allowing the migration of animals and dispersal of plants in both directions
白令海峡（将西伯利亚最东端和阿拉斯加分开的狭窄海洋通道，连接北冰洋与白令海，最窄处85公里，即53英里；在冰河时代，因海平面下降，白令陆桥形成，使两大洲的动植物得以向两边迁徙、扩散）