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 United States 55 53.9%
2 China 20 19.6%
3 Germany 8 7.8%
4 France 5 4.9%
5 Russia 4 3.9%
6 Canada 4 3.9%
7 Finland 2 2%
8 Czech Republic 1 1%
9 Singapore 1 1%
10 Taiwan 1 1%
11 Hong Kong 1 1%