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 173 54.2%
2 United States 62 19.4%
3 Germany 28 8.8%
4 Canada 26 8.2%
5 Ireland 8 2.5%
6 Korea, Republic of 7 2.2%
7 Russia 5 1.6%
8 Taiwan 3 0.9%
9 United Kingdom 2 0.6%
10 Singapore 2 0.6%
11 Netherlands 2 0.6%
12 Sweden 1 0.3%