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 439 56.5%
2 United States 140 18%
3 Netherlands 100 12.9%
4 Germany 60 7.7%
5 Canada 17 2.2%
6 Taiwan 4 0.5%
7 France 4 0.5%
8 Hong Kong 3 0.4%
9 India 3 0.4%
10 Russia 3 0.4%
11 Korea, Republic of 2 0.3%
12 Norway 1 0.1%
13 Sweden 1 0.1%