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 54.8%
2 United States 49 16.9%
3 Germany 43 14.8%
4 Russia 9 3.1%
5 Japan 5 1.7%
6 Canada 5 1.7%
7 United Kingdom 4 1.4%
8 Switzerland 3 1%
9 Taiwan 3 1%
10 Ukraine 3 1%
11 South Africa 2 0.7%
12 Singapore 1 0.3%
13 1 0.3%
14 France 1 0.3%
15 Korea, Republic of 1 0.3%
16 Netherlands 1 0.3%