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 178 48.5%
2 United States 108 29.4%
3 Germany 36 9.8%
4 Netherlands 17 4.6%
5 Canada 11 3%
6 Singapore 4 1.1%
7 Spain 2 0.5%
8 Sweden 2 0.5%
9 Iran, Islamic Republic of 2 0.5%
10 Macao 2 0.5%
11 Ukraine 2 0.5%
12 Russia 2 0.5%
13 Taiwan 1 0.3%