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 72 47.1%
2 United States 36 23.5%
3 Netherlands 10 6.5%
4 Russia 10 6.5%
5 Germany 8 5.2%
6 Sweden 7 4.6%
7 Taiwan 4 2.6%
8 Norway 3 2%
9 Hong Kong 1 0.7%
10 Colombia 1 0.7%
11 Czech Republic 1 0.7%