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 United States 62 43.4%
2 China 37 25.9%
3 Netherlands 15 10.5%
4 Germany 6 4.2%
5 Taiwan 5 3.5%
6 Canada 4 2.8%
7 Hong Kong 3 2.1%
8 Japan 3 2.1%
9 Denmark 2 1.4%
10 Switzerland 2 1.4%
11 United Kingdom 1 0.7%
12 Viet Nam 1 0.7%
13 Sweden 1 0.7%
14 Korea, Republic of 1 0.7%