389 is the number of days in a year (365) added to the number of months twice (24).这里的months twice 该怎么理解?

389 is the number of days in a year (365) added to the number of months twice (24).
这里的months twice 该怎么理解?

389就是一年的天数（365）加上它的月数（12）的两倍（24）.
即：389=365+12×2
months twice 不能说在一起.

月数的两倍