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 201 64.2%
2 United States 51 16.3%
3 Germany 41 13.1%
4 Iran, Islamic Republic of 3 1%
5 Russia 3 1%
6 Netherlands 3 1%
7 Norway 2 0.6%
8 Canada 2 0.6%
9 Singapore 2 0.6%
10 Sweden 2 0.6%
11 United Kingdom 2 0.6%
12 Moldova, Republic of 1 0.3%