sac中文什么意思

SAC ＝Strategic Air Command 〔美国〕战略空军司令部。n.
1.【生物学】囊，液囊。
2.上衣 (＝sack)。

• abdominal sac:    腹囊
• accessory sac:    附囊
• air sac:    肺胞囊; 气囊气孔

例句与用法

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1. 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。
2. 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。
3. 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。
4. 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。
5. Never leave the cul - de - sac . never leave the cul - de - -
   决不离开死巷决不离开死. .

英文释义

名词

1. a structure resembling a bag in an animal
2. a case or sheath especially a pollen sac or moss capsule
   同义词：theca
3. an enclosed space; "the trapped miners found a pocket of air"
   同义词：pouch, sack, pocket