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 39 25.3%
2 United States 32 20.8%
3 Netherlands 17 11%
4 Germany 16 10.4%
5 South Africa 14 9.1%
6 Iran, Islamic Republic of 10 6.5%
7 Hong Kong 8 5.2%
8 India 7 4.5%
9 Czech Republic 5 3.2%
10 France 3 1.9%
11 Russia 2 1.3%
12 Taiwan 1 0.6%