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 United States 42 22%
2 China 40 20.9%
3 Netherlands 26 13.6%
4 Canada 17 8.9%
5 Germany 15 7.9%
6 Sweden 13 6.8%
7 Hong Kong 9 4.7%
8 India 8 4.2%
9 Bulgaria 4 2.1%
10 France 4 2.1%
11 Belgium 3 1.6%
12 Brazil 3 1.6%
13 Spain 2 1%
14 Czech Republic 2 1%
15 Russia 1 0.5%
16 Taiwan 1 0.5%
17 Moldova, Republic of 1 0.5%