| 释义 |
海沟hǎigōu深度超过6,000米的狭长的海底凹地。两侧坡度陡急,分布于大洋边缘。如太平洋的菲律宾海沟、大西洋的波多黎各海沟等。{oceanic trench; submarine trench; narrow ditch on the seafloor over 6,000 metres deep, which has steep slopes and is found at the edges of oceans, e.g. the Philippine Trench of the Pacific Ocean, the Puerto Rico Trench of the Atlantic Ocean, etc.} |