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 270 59%
2 United States 77 16.8%
3 Canada 35 7.6%
4 Germany 33 7.2%
5 Iran, Islamic Republic of 13 2.8%
6 Taiwan 11 2.4%
7 Hong Kong 5 1.1%
8 Singapore 4 0.9%
9 Russia 3 0.7%
10 Switzerland 2 0.4%
11 Netherlands 2 0.4%
12 Japan 1 0.2%
13 Macao 1 0.2%
14 India 1 0.2%