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 107 37.7%
2 China 92 32.4%
3 Netherlands 22 7.7%
4 Germany 18 6.3%
5 Russia 12 4.2%
6 Poland 10 3.5%
7 Korea, Republic of 8 2.8%
8 Ghana 7 2.5%
9 India 2 0.7%
10 Canada 2 0.7%
11 Turkmenistan 2 0.7%
12 Ukraine 1 0.4%
13 Chile 1 0.4%