Fibonacci series
noun /ˌfɪbəˈnɑːtʃi sɪəriːz/
/ˌfɪbəˈnɑːtʃi sɪriːz/
(also Fibonacci sequence)
(mathematics- a series of numbers in which each number is equal to the two numbers before it added together. Starting from 1, the series is 1,1,2,3,5,8,13, etc.
斐波那契数列（其中每数等于前面两数之和）