BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 77 53.8%
2 United States 29 20.3%
3 Germany 17 11.9%
4 Hong Kong 6 4.2%
5 Russia 3 2.1%
6 Canada 3 2.1%
7 Czech Republic 2 1.4%
8 Singapore 1 0.7%
9 Taiwan 1 0.7%
10 Ukraine 1 0.7%
11 Japan 1 0.7%
12 Korea, Republic of 1 0.7%
13 Portugal 1 0.7%