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 158 66.1%
2 Germany 32 13.4%
3 United States 26 10.9%
4 Ireland 5 2.1%
5 Canada 4 1.7%
6 Singapore 2 0.8%
7 Norway 2 0.8%
8 Japan 2 0.8%
9 2 0.8%
10 Bulgaria 2 0.8%
11 Finland 1 0.4%
12 France 1 0.4%
13 Moldova, Republic of 1 0.4%
14 Romania 1 0.4%