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 63 52.1%
2 United States 15 12.4%
3 South Africa 11 9.1%
4 Germany 11 9.1%
5 Netherlands 6 5%
6 Russia 5 4.1%
7 France 3 2.5%
8 Czech Republic 2 1.7%
9 India 2 1.7%
10 Taiwan 2 1.7%
11 Canada 1 0.8%