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 112 42.9%
2 China 91 34.9%
3 Netherlands 10 3.8%
4 Germany 9 3.4%
5 Korea, Republic of 8 3.1%
6 Poland 8 3.1%
7 Russia 7 2.7%
8 Ghana 5 1.9%
9 United Kingdom 3 1.1%
10 India 2 0.8%
11 Norway 2 0.8%
12 Australia 1 0.4%
13 France 1 0.4%
14 South Africa 1 0.4%
15 Sweden 1 0.4%