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 131 48.3%
2 China 82 30.3%
3 Netherlands 19 7%
4 Germany 10 3.7%
5 Russia 8 3%
6 Poland 5 1.8%
7 Korea, Republic of 5 1.8%
8 Ghana 4 1.5%
9 India 2 0.7%
10 Norway 2 0.7%
11 Canada 1 0.4%
12 Sweden 1 0.4%
13 Switzerland 1 0.4%