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 168 44.3%
2 United States 146 38.5%
3 Germany 35 9.2%
4 Korea, Republic of 8 2.1%
5 Taiwan 6 1.6%
6 Hong Kong 3 0.8%
7 Canada 3 0.8%
8 Japan 2 0.5%
9 Kenya 2 0.5%
10 Ukraine 2 0.5%
11 Macao 1 0.3%
12 Russia 1 0.3%
13 Armenia 1 0.3%
14 Georgia 1 0.3%