(里面充满轻气的橡胶布囊) gasbag; gas cell; pneumatophore; pneumatocyst; pneumathode; envelope; cell; aerocyst; aerostats 气囊；气囊筒 bellow pot .
双语例句
1
Shark is the only fish in the sea that has no pneumatocyst, which means that it will swim to the bottom or even die if stopping swimming for a little while.