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internal sac yolk 内卵黄囊
The activities of CAT and SOD and the effects of the activities of CAT and SOD under the different conditions of NH3-N in internal sac of Haliotis diversicolor supertexta were investigated. 通过测定不同氨氮条件下的九孔鲍内脏囊中的过氧化氢酶（CAT）和超氧化物歧化酶（SOD）活力，观察氨氮对九孔鲍CAT和SOD酶活力的影响。
yolk, internal sac 内卵黄囊
The yolk sac is gradually vascularized. 卵黄囊逐渐被血管化了。
ON ANATOMICAL STRUCTURE OF THE INTERNAL SAC OF AEDEAGUS IN GENUS ACALOLEPTA 锦天牛属阳茎内囊结构
Meckel's diverticulum is the rudiment of the embryonic yolk sac. 麦克尔憩室是胚胎黄囊的未发育完全器官。
external sac yolk 外卵黄囊
I can send him a note via the internal mail system. 我可以通过内部通信系统给他发个通知。
The convoy commodore sees to the internal management of the convoy. 舰队司令官负责管理舰队的内部问题。
This is not the season for internal quarrels. 现在不是内部相争的时候。
An organic sac or pouch, such as the udder of a cow. (牛的)乳房有机体器官的液囊或袋，如牛的乳房
I talked to him on the internal telephone. 我在内部电话上与他交谈。
There was a rapid increase in internal trade. 国内贸易迅速增长。
The gonads form from a group of large granulated yolk sac cells which invacle the germinal ridges. 性腺是由一群大的颗粒的卵黄囊细胞入缀生殖峭而形成。
The peritoneal cavity is a closed sac. 腹膜腔是一个封闭的囊腔。
A tube with a very small internal diameter. 毛细管一根内径十分细小的管子
A fluid-containing sac or cavity in the body of an organism. 池有机体体内一种贮存流体的液囊或穴
The new intern is a little frisky. 这个新来的实习生有一点爱戏闹。
I worked as an intern in that firm last summer. 去年夏天我在那家商行实习。
The zebra pattern is fairly distinct, and the yolk sac begins to flatten out as it is absorbed. 斑马格局相当鲜明,并卵黄囊开始平平,因为它是吸收。