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 170 61.4%
2 United States 37 13.4%
3 Germany 28 10.1%
4 Canada 13 4.7%
5 Denmark 10 3.6%
6 Russia 5 1.8%
7 France 4 1.4%
8 Japan 2 0.7%
9 Netherlands 2 0.7%
10 Singapore 2 0.7%
11 Taiwan 2 0.7%
12 Ireland 1 0.4%
13 1 0.4%