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 159 46.4%
2 United States 119 34.7%
3 Germany 32 9.3%
4 Taiwan 12 3.5%
5 Singapore 5 1.5%
6 Canada 4 1.2%
7 Iran, Islamic Republic of 3 0.9%
8 Japan 2 0.6%
9 Hong Kong 2 0.6%
10 Burkina Faso 2 0.6%
11 1 0.3%
12 Netherlands 1 0.3%
13 Spain 1 0.3%