n.藤壺；難以擺脫的人(或東西)；黑雁
The barnacle and the clam are two examples of filter feeders. 藤壺和蛤類是濾過覓食者的兩種例子。
The shell of a sessile barnacle is attached directly to a substrate. 無柄藤壺的殼是直接附著在底部的。
