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 80 33.5%
2 China 71 29.7%
3 Korea, Republic of 15 6.3%
4 Austria 11 4.6%
5 Netherlands 11 4.6%
6 Lithuania 8 3.3%
7 Germany 7 2.9%
8 United Kingdom 5 2.1%
9 Finland 4 1.7%
10 France 4 1.7%
11 Sweden 4 1.7%
12 Switzerland 3 1.3%
13 Taiwan 3 1.3%
14 Norway 3 1.3%
15 Canada 2 0.8%
16 India 2 0.8%
17 Ireland 1 0.4%
18 Italy 1 0.4%
19 Japan 1 0.4%
20 Russia 1 0.4%
21 Spain 1 0.4%
22 Togo 1 0.4%