Frena
[fri:nә]
解釋/意思:
(pl. ) of Frenum
編輯:珀西
例句/造句/用法:
- These cirripedes have no branchiae, the whole surface of the body and of the sack, together with the small frena, serving for respiration. 查理斯·達爾文. 物種起源.
- The ovigerous frena of certain cirripedes, which have ceased to give attachment to the ova and are feebly developed, are nascent branchiae. 查理斯·達爾文. 物種起源.
編輯:珀西