| 1. | The peritoneal cavity is a closed sac .
腹膜腔是一个封闭的囊腔。
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| 2. | The testis sacs communicate with the seminal vesicles .
精巢囊与储精囊相连。
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| 3. | 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。
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| 4. | 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。
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| 5. | The heart sounds are muffled when the pericardial sac is distended with fluid .
当心包充满液体时心音减弱。
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| 6. | Starch grains present in the embryo sac and placenta are utilized by the embryo .
存在于胚囊和胎座中的淀粉粒为胚胎所利用。
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| 7. | In the first method, one drop of this dilution is dropped into the conjunctival sac .
第一种方法是将一滴这种稀释液滴入结膜囊。
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| 8. | 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。
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| 9. | The bombardier's secretion is produced in a pair of glands-large sacs placed side by side in the beetle's abdomen .
喷雾甲虫的分泌液是在一对腺体--甲虫腹内并列的一对大液囊--里形成的。
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| 10. | Never leave the cul - de - sac . never leave the cul - de - -
决不离开死巷决不离开死. .
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