说明：  在matlab中读取grib文件,GRIB 码是与计算机无关的压缩的二进制编码,主要用来表示数值天气预报的产品资料。现行的GRIB 码版本有GRIB1 和GRIB2 两种格式。
(Reading grib file in matlab, GRIB code is a computer-independent compression binary code, which is mainly used to represent the product data of numerical weather forecast. The current version of GRIB code has two formats: GRIB1 and GRIB2.)