n. (动植物组织中的)囊,液囊
abbr. 缩写 = (US) Strategic Air Command 战略空军司令部。
网络 中国国家标准化管理委员会(Standardization Administration of China); 上海质量体系审核中心; 国家标准委
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。
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。
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。
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。
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。