pod  
noun [ C ] uk/pɒd/ us/pɑːd/
  (PLANT)      
  荚;荚果
a long, narrow, flat part of some plants, such as beans and peas, that contains the seeds and usually has a thick skin
  seed pods 心皮 
 a pea/vanilla pod 豌豆荚/香子兰荚 
   (STRUCTURE)         
  吊舱;(翼梢等上的)发射架;副油箱
a long, narrow container that is attached to an aircraft for carrying engines, weapons, extra fuel, etc.
  an escape/storage/fuel pod 逃生/储藏/燃料舱 
 a space pod 太空舱 
  (通常为圆形的)简易小屋
a small simple building, often rounded in shape
  You can camp, or stay in a single-storey "eco pod" with a wood-burning stove. 你可以露营,也可以住在单层的“生态小屋”,里面有烧柴的炉子。 
   (WHALES/DOLPHINS)     
 海洋哺乳动物(如鲸鱼、海豚等)
a group of sea mammals such as whales or dolphins