现在有一类型：std::vector<std::pair<std::string, std::vector<string>>>，请问如何分别取到std::pair中的std::string和std::vector<string>呢

要分别取到`std::pair`中的`std::string`和`std::vector<string>`，可以使用`std::get`函数。示例代码如下：

#include <iostream>
#include <vector>
#include <string>

int main() {
    std::vector<std::pair<std::string, std::vector<std::string>>> vec;

    // 添加一些数据到vec中
    vec.push_back(std::make_pair("pair1", std::vector<std::string>{"string1", "string2", "string3"}));
    vec.push_back(std::make_pair("pair2", std::vector<std::string>{"string4", "string5"}));
    vec.push_back(std::make_pair("pair3", std::vector<std::string>{"string6"}));

    // 遍历vec，取出每个pair中的string和vector<string>
    for (const auto& pair : vec) {
        std::cout << "First string: " << std::get<0>(pair) << std::endl;
        std::cout << "Second vector of string: ";
        
        const auto& vectorOfString = std::get<1>(pair);
        for (const auto& str : vectorOfString) {
            std::cout << str << " ";
        }
        std::cout << std::endl;
    }

    return 0;
}

输出结果：

First string: pair1
Second vector of string: string1 string2 string3 
First string: pair2
Second vector of string: string4 string5 
First string: pair3
Second vector of string: string6