N a brown seaweed, Chorda filum, that grows on stones under sandy bottoms and produces chordlike fronds up to 8.5 metres (28 ft) long 绳藻
N（名词） a brown seaweed, Chorda filum, that grows on stones under sandy bottoms and produces chordlike fronds up to 8.5 metres (28 ft) long 绳藻