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 29 32.6%
2 Germany 23 25.8%
3 Netherlands 13 14.6%
4 China 10 11.2%
5 United Kingdom 5 5.6%
6 Denmark 3 3.4%
7 India 2 2.2%
8 Korea, Republic of 1 1.1%
9 Switzerland 1 1.1%
10 Canada 1 1.1%
11 Colombia 1 1.1%