把第一个合计数与第二个加在一起。
注：全国合计数包括国家林业局直属单位数据。
Note: Data of national total include the units directly under State Forestry Administration.
相关的原理和方法对解决某些组合计数问题有所帮助。
The relevant principle and method are helpful to solve some counting problems in combination problems.
相关的原理和方法对解决某些组合计数问题有所帮助。
The relevant principle and method are helpful to solve some counting problems in combination problems.
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