Noun:

1. a class of fish having a skeleton composed of bone in addition to cartilage

OSTabbr.科学与技术处(=office of science and technology)abbr.作战适用性试验(=operational suitability testing)ostholn.渥斯脑

1. Gnathostomes include the bony Osteichthyes and the cartilaginous Chondrichthyes.
   有颌类包括硬骨鱼类以及软骨鱼类。