arr.sort(); arr_a = arr.slice(0, 3).join(', ') arr_b = arr[3] arr_echo = 欢迎${arr_a}和${arr_b}同学!; console.log(arr_echo);
欢迎${arr_a}和${arr_b}同学!
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Eric_Bao_New
arr.sort(); arr_a = arr.slice(0, 3).join(', ') arr_b = arr[3] arr_echo =
欢迎${arr_a}和${arr_b}同学!
; console.log(arr_echo);