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 170 40.5%
2 China 147 35%
3 Canada 40 9.5%
4 Germany 35 8.3%
5 Netherlands 11 2.6%
6 United Kingdom 5 1.2%
7 Azerbaijan 3 0.7%
8 Russia 3 0.7%
9 Singapore 2 0.5%
10 Brazil 2 0.5%
11 South Africa 1 0.2%
12 Switzerland 1 0.2%