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 185 46.4%
2 United States 95 23.8%
3 Germany 43 10.8%
4 Canada 38 9.5%
5 Netherlands 15 3.8%
6 Sweden 12 3%
7 Korea, Republic of 3 0.8%
8 Taiwan 2 0.5%
9 United Kingdom 2 0.5%
10 Hong Kong 2 0.5%
11 Czech Republic 2 0.5%