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 89 42.6%
2 China 52 24.9%
3 Netherlands 21 10%
4 Germany 14 6.7%
5 Russia 10 4.8%
6 Korea, Republic of 6 2.9%
7 France 5 2.4%
8 Czech Republic 2 1%
9 Hong Kong 2 1%
10 India 2 1%
11 Turkey 2 1%
12 United Kingdom 2 1%
13 Norway 1 0.5%
14 Canada 1 0.5%