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1·More than 750,000 have graduated from SAC, with many seeking employment in engineering, aviation, education and a wide variety of other professions.

超过75万人从SAC毕业，其中许多人在工程、航空、教育和其他各种领域中寻找工作机会。

2·They must also keep swimming to keep from sinking, since most have largely or completely lost the swim bladder, the gas-filled sac that helps most other fish remain buoyant.

它们还必须不停地游动以避免下沉，因为大多数鱼基本上或完全失去了鱼鳔，这个充满气体的囊帮助大多数其他鱼保持浮力。

3·The melon is kind of a large sac-like pouch, made up of fat tissue.

甜瓜是一种大的囊状袋子，由脂肪组织构成。

4·Chris has talked about pandas being an evolutionary cul-de-sac, and it's certainly unusual for a carnivore to take up herbivory.

克里斯曾经说熊猫是进化的尽头，而对于食肉动物来说，摄取食草动物是很不寻常的。

5·More than 750,000 have graduated from SAC(Space and Aviation Center), with many seeking employment in engineering, aviation, education, medicine and a wide variety of other professions.

超过75万人从航天中心毕业，其中许多人在工程、航空、教育、医学和其他各种专业上寻求就业机会。

6·Extraembryonic mesoderm migrates through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.

胚外中胚层在妊娠的第6.5至7.0天之间通过原始条带迁移到推测的卵黄囊。

7·Some of the models contained an air sac.

其中一些模型含有气囊。

8·Is the sac and Fox Indian tribe a wild one?

袋与狐部落是野蛮部落吗？

9·Cessna expects SAC to produce 150 aircraft next year.

塞斯纳期望沈飞明年生产150架。

10·The sac is very strong, like a balloon filled with water.

这个囊很结实，就像是装了水的气球。

囊

1·Extraembryonic mesoderm migrates through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.

胚外中胚层在妊娠的第6.5至7.0天之间通过原始条带迁移到推测的卵黄囊。

2·One touch of a female's egg sac and they go ballistic, grappling any other male within reach.

变得争强好胜。 仅仅是对雌性卵囊接触也会使得他们反应过度，和范围内潜在的雄性扭打一团。

3·A similar sac is much bigger in other animals than it is in humans and is used to aid in digesting high cellulose diets.

在其它动物身上，类似的一个囊会更大一些，它是用来消化高纤维素食物的。

4·Worse was to come when tests also confirmed a tear in the amniotic sac, which meant the waters were leaking.

更糟糕的是，他们还检测到，羊膜囊也破裂了，羊水开始外流。

5·On average, he said, one out of every 20,000 chicken eggs contains a small amount of salmonella that is deposited into the sac by the hen.

每2万个鸡蛋中会有一个鸡蛋带有少量沙门氏菌，这是由母鸡下蛋时分泌在液囊里。

(1)embryo sac胚囊

(1)yolk sac（等于yolk bag）卵黄囊

(1)lacrimal sac[解]泪囊

(1)air sac气囊；肺泡；肺胞囊

(1)yolk sac tumor卵黄囊瘤；卵巢内胚层窦瘤