Frena
[fri:nә]
解释:
(pl. ) of Frenum
编辑:珀西
例句:
- These cirripedes have no branchiae, the whole surface of the body and of the sack, together with the small frena, serving for respiration. 查尔斯·达尔文. 物种起源.
- The ovigerous frena of certain cirripedes, which have ceased to give attachment to the ova and are feebly developed, are nascent branchiae. 查尔斯·达尔文. 物种起源.
编辑:珀西