BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 318 66.4%
2 United States 81 16.9%
3 Germany 37 7.7%
4 Canada 15 3.1%
5 Hong Kong 8 1.7%
6 Netherlands 5 1%
7 South Africa 5 1%
8 Taiwan 5 1%
9 Ukraine 2 0.4%
10 Japan 2 0.4%
11 Spain 1 0.2%