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 74 34.7%
2 China 67 31.5%
3 Germany 25 11.7%
4 Netherlands 13 6.1%
5 Russia 9 4.2%
6 Korea, Republic of 6 2.8%
7 Senegal 5 2.3%
8 Norway 4 1.9%
9 France 3 1.4%
10 Nigeria 2 0.9%
11 Switzerland 1 0.5%
12 Brazil 1 0.5%
13 Canada 1 0.5%
14 Malaysia 1 0.5%
15 Hungary 1 0.5%