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 United States 39 26.9%
2 China 32 22.1%
3 Germany 24 16.6%
4 Netherlands 20 13.8%
5 Russia 8 5.5%
6 Japan 5 3.4%
7 India 3 2.1%
8 France 3 2.1%
9 Hong Kong 2 1.4%
10 Singapore 2 1.4%
11 Spain 2 1.4%
12 United Kingdom 2 1.4%
13 Poland 1 0.7%
14 Italy 1 0.7%
15 Brazil 1 0.7%