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 164 38.6%
2 United States 137 32.2%
3 Germany 36 8.5%
4 Netherlands 22 5.2%
5 Korea, Republic of 19 4.5%
6 Lithuania 10 2.4%
7 Sweden 9 2.1%
8 Togo 8 1.9%
9 Taiwan 5 1.2%
10 France 4 0.9%
11 Norway 4 0.9%
12 South Africa 3 0.7%
13 Denmark 2 0.5%
14 India 1 0.2%
15 Russia 1 0.2%