柯林斯詞典sofar /?s??fɑ?/ 1. N a system for determining a position at sea, esp that of survivors of a disaster, by exploding a charge underwater at that point. The times taken for the shock waves to travel through the water to three widely separated shore stations are used to calculate their position 聲發(fā); 海底聲定位測距法 返回 so far