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 58.5%
2 United States 46 15.6%
3 Germany 41 13.9%
4 Taiwan 8 2.7%
5 Bolivia, Plurinational State of 8 2.7%
6 Netherlands 6 2%
7 Russia 3 1%
8 Singapore 3 1%
9 Hong Kong 2 0.7%
10 United Kingdom 2 0.7%
11 Viet Nam 2 0.7%
12 Ukraine 1 0.3%