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 311 50.9%
2 United States 140 22.9%
3 Netherlands 63 10.3%
4 Germany 51 8.3%
5 Canada 18 2.9%
6 Ukraine 6 1%
7 France 4 0.7%
8 Japan 3 0.5%
9 Norway 3 0.5%
10 Singapore 2 0.3%
11 Sweden 2 0.3%
12 United Kingdom 2 0.3%
13 Korea, Republic of 2 0.3%
14 India 1 0.2%
15 Ireland 1 0.2%
16 1 0.2%
17 Taiwan 1 0.2%