n.藤壶；难以摆脱的人(或东西)；黑雁
The barnacle and the clam are two examples of filter feeders. 藤壶和蛤类是滤过觅食者的两种例子。
The shell of a sessile barnacle is attached directly to a substrate. 无柄藤壶的壳是直接附着在底部的。
