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 447 66.3%
2 United States 137 20.3%
3 Germany 28 4.2%
4 Hong Kong 23 3.4%
5 Netherlands 10 1.5%
6 Canada 10 1.5%
7 Russia 5 0.7%
8 Macao 5 0.7%
9 Singapore 3 0.4%
10 Taiwan 2 0.3%
11 Brazil 2 0.3%
12 France 1 0.1%
13 Serbia 1 0.1%