Google Earth engine - use MODIS data to export the fire area of monthly data

To be honest, this is a code given by others on the Internet , And his demand is to ask for the excessive area every month , And export it , And the key point of the problem , What is used here is map instead of evaluate Or is it for The amount of circulation , So there may be some differences ：

The functions used here ：

Round()
Calculate the integer closest to the input value .

Parameters .
this: Input （Number）.
The input values .

return . The number .

advance(delta, unit, timeZone)
By giving Date Add the specified units to create a new Date.

Parameters .
this:date (Date)
delta ( Floating point numbers )
Company （ character string ）.
year "、" month "、" Zhou "、" Japan "、" Hours "、" minute " or " second " One of them .

timeZone (String, default: null):
The time zone （ for example "America/Los_Angeles"）; The default is UTC.

return . date

ee.Feature(geometry, properties)
The feature can be constructed from one of the following parameters plus an optional attribute dictionary .

One ee.Geometry.

One GeoJSON Geometry .

One GeoJSON features .

A calculation object ： If an attribute is specified , Is reset