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 172 58.9%
2 United States 45 15.4%
3 Germany 39 13.4%
4 Canada 17 5.8%
5 Korea, Republic of 7 2.4%
6 Singapore 4 1.4%
7 Turkey 2 0.7%
8 Netherlands 2 0.7%
9 Russia 2 0.7%
10 Israel 1 0.3%
11 Sweden 1 0.3%