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 42 36.8%
2 China 20 17.5%
3 Netherlands 19 16.7%
4 Germany 7 6.1%
5 Italy 6 5.3%
6 Algeria 6 5.3%
7 France 4 3.5%
8 Russia 3 2.6%
9 Canada 2 1.8%
10 Japan 2 1.8%
11 Korea, Republic of 2 1.8%
12 United Kingdom 1 0.9%