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 140 55.6%
2 United States 43 17.1%
3 Germany 35 13.9%
4 Canada 18 7.1%
5 United Kingdom 4 1.6%
6 Russia 2 0.8%
7 Spain 2 0.8%
8 Hong Kong 2 0.8%
9 Italy 2 0.8%
10 Netherlands 1 0.4%
11 Norway 1 0.4%
12 Brazil 1 0.4%
13 Denmark 1 0.4%