degree of freedom
noun
1- each of a number of independently variable factors affecting the range of states in which a system may exist, in particular自由度, 尤指：
1.1
- Physics a direction in which independent motion can occur【物理】自由度。
1.2
- Chemistry each of a number of independent factors required to specify a system at equilibriu m【化】自由度。
1.3
- Statistics the number of independent values or quantities which can be assigned to a statistical distribution【统计】自由度。