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 145 54.3%
2 United States 48 18%
3 Germany 46 17.2%
4 Russia 8 3%
5 Canada 6 2.2%
6 Brazil 2 0.7%
7 Finland 2 0.7%
8 Singapore 2 0.7%
9 Spain 2 0.7%
10 United Kingdom 2 0.7%
11 Turkey 1 0.4%
12 Kazakhstan 1 0.4%
13 Netherlands 1 0.4%
14 Poland 1 0.4%