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 71 40.3%
2 China 59 33.5%
3 Germany 9 5.1%
4 Poland 8 4.5%
5 Netherlands 8 4.5%
6 Korea, Republic of 6 3.4%
7 Ghana 5 2.8%
8 India 2 1.1%
9 United Kingdom 2 1.1%
10 Norway 2 1.1%
11 France 1 0.6%
12 Russia 1 0.6%
13 South Africa 1 0.6%
14 Sweden 1 0.6%