BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 139 58.6%
2 United States 55 23.2%
3 Germany 16 6.8%
4 Netherlands 15 6.3%
5 Hong Kong 4 1.7%
6 Czech Republic 2 0.8%
7 United Kingdom 2 0.8%
8 Bolivia, Plurinational State of 1 0.4%
9 Canada 1 0.4%
10 Portugal 1 0.4%
11 Ukraine 1 0.4%