bullhead

1. A bullhead always likes chopping logic with others.
   一个顽固不化的人总是喜欢强词夺理。
2. I put two months of work into my exhibit, which was a 9cm European bullhead.
   我用两个月的时间准备我的展品，这是一条9厘米长的欧洲大头鱼。
3. In addition, the microstructure and ultrastructure of the peripheral blood cells and the thymus of the bullhead catfish were observed and described.
   本研究还对黄颡鱼血细胞的显微和亚显微结构进行了观察，此外，还对不同年龄的正常黄颡鱼的胸腺的显微结构进行了观察。

noun

1. any of several common freshwater catfishes of the United States

   Synonym:    bullhead catfish

2. freshwater sculpin with a large flattened bony-plated head with hornlike spines