Particular versions of a character. Thus, the character ‘horns’ may have the character states ‘straight’, ‘curly’, etc. The proper elucidation of character states and their polarity is one of the major concerns of cladistic analysis.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。