complexity
/kəmˈpleksətɪ/noun
(pl. -ies)［mass noun］
1- the state or quality of being intricate or complicated复杂; 复杂性：
an issue of great complexity.
非常复杂的问题。
1.1
- count noun（一般作complexities）a factor involved in a complicated process or situation复杂因素; 复杂情况：
the complexities of family life.
家庭生活中的复杂因素。