SAC

英

美

abbr. 南方空军司令部（南非）(Southern Air Command)

复数：sacs　

Collins.1 / BNC.16085 / COCA.17836

牛津词典

noun

（人、动植物体内的）囊，液囊，气囊
a part inside the body of a person, an animal or a plant, that is shaped like a bag, has thin skin around it, and contains liquid or air

N-COUNT (动物体内的)囊，液囊，气囊
Asacis a small part of an animal's body, shaped like a little bag. It contains air, liquid, or some other substance.
1. The lungs consist of millions of tiny air sacs.
  肺由数百万个小气囊组成。

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。
On midsagittal images, AP dural sac diameter and the upper-endplate angles of L1 and S1 were measured.
在正中矢状位图像上测量了L1和S1水平的硬脊膜囊的前后径和上终板角。
Pollen tube entered the embryo sac via one synergid and in it released two sperms.
花粉管经由一个助细胞进入胚囊，并在助细胞中释放两个精子。
I accidentally ripped her dural sac.
我不小心撕裂了她的硬脊膜囊。
Three pregnant uterus can be open and add to simulated gestation sac;
三个怀孕子宫都可以打开，放入模拟妊娠囊。
The nectar that a bee can bring back in its honey sac.
蜜蜂能装入蜜囊带回去的花蜜。
Embryo sac and embryo development and embryo rescue in Lilium distant cross
百合远缘杂交的胚囊和胚胎发育及胚拯救
Several live worms were found in his conjunctiva sac.
后来在门诊中发现结膜囊里有数只活寄生虫。
The chorion and amnion are foetal membranes that contribute to the placenta and the foetal sac respectively.
绒毛膜和羊膜是分别形成胎盘和羊膜囊的胎膜组织。
Surgical methods included direct searching method, curved needle method and lacrimal sac incision.
手术方法分别采用直接寻找法，弯针法，泪囊切开法。