囊

• He's cut out the poison bag .
  他挖掉了（蛇的）毒囊。
• The pocket of water lies between the resin and finish .
  水囊存在于树脂与处理剂之间。
• They may form concentrated pockets in gravels .
  它们可能在砾石堆积物中形成富集的矿囊。
• Palmen's organ may perhaps also function as a statocyst .
  柏氏器可能也有如平衡囊的作用。
• It consists of a stack of flat, membrane-bounded sacs .
  它由一大堆扁平的膜缘清楚的囊组成。
• Sporangiospores are produced within a specialized structure .
  孢囊孢子是产生于专门结构内。
• Usually earthworms have two or more pairs of spermathecal pores .
  蚯蚓常常有两对或多对受精囊孔。
• Amniocentesis is the removal of fluid from the amniotic sac .
  羊膜穿刺术是从羊膜囊抽取羊水的技术。
• The oothecae of this species were abundant in late may and june .
  这个物种的卵囊在5月下旬至6月最多。
• Metacercariae may endure in the encysted state for several months .
  活囊蚴可以在包囊状态中生活几个月。