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 198 49.5%
2 United States 71 17.8%
3 Germany 41 10.2%
4 Netherlands 32 8%
5 Sweden 16 4%
6 Canada 13 3.2%
7 Taiwan 12 3%
8 Russia 6 1.5%
9 Ukraine 3 0.8%
10 Viet Nam 3 0.8%
11 Hong Kong 2 0.5%
12 Belgium 1 0.2%
13 France 1 0.2%
14 United Kingdom 1 0.2%