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 306 70.3%
2 United States 67 15.4%
3 Germany 28 6.4%
4 Russia 7 1.6%
5 Netherlands 6 1.4%
6 Hong Kong 4 0.9%
7 Japan 4 0.9%
8 Canada 4 0.9%
9 Bulgaria 3 0.7%
10 Armenia 1 0.2%
11 Brazil 1 0.2%
12 Romania 1 0.2%
13 Singapore 1 0.2%
14 Taiwan 1 0.2%
15 United Kingdom 1 0.2%