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 106 45.9%
2 China 70 30.3%
3 Netherlands 22 9.5%
4 Canada 11 4.8%
5 Russia 10 4.3%
6 Pakistan 5 2.2%
7 Austria 2 0.9%
8 France 1 0.4%
9 Germany 1 0.4%
10 Hong Kong 1 0.4%
11 India 1 0.4%
12 Korea, Republic of 1 0.4%