ink sac中文什么意思

ink sac ＝ ink bag.

• ink:    n. 1.墨水；(印刷用的)油墨。 ...
• sac:    n. 1.【生物学】囊，液囊。 2. ...
• sac:    SAC ＝Strategic Air ...

百科释义

With the exception of nocturnal and very deep water cephalopods, all coeloids which dwell in light conditions have an ink sac, which can be used to expel a cloud of dark ink to confuse predators. This sac is a muscular bag which originated as an extension of the hind gut; it is a modified hypobranchial gland.