冲绳海槽南起我国台湾省东端,北至日本九州西南部,形似向东南方凸出的新月,总体呈东北—西南向。(见图1)海槽全长800多公里,较宽处为120公里,最狭处仅50公里,面 The Okinawa Trough south of our country from the eastern tip of Taiwan Province, north to Japan’s southwestern Kyushu, the shape of the new moon protruding to the southeast, the overall northeast - southwest. (See Figure 1) Trough length of more than 800 kilometers, 120 kilometers wide, the narrowest of only 50 kilometers, the surface