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 245 52.8%
2 United States 111 23.9%
3 Germany 35 7.5%
4 Netherlands 30 6.5%
5 Canada 24 5.2%
6 Hong Kong 5 1.1%
7 Japan 4 0.9%
8 Korea, Republic of 2 0.4%
9 Romania 2 0.4%
10 Singapore 2 0.4%
11 Taiwan 2 0.4%
12 Austria 1 0.2%
13 Slovenia 1 0.2%