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 218 59.7%
2 United States 53 14.5%
3 Germany 36 9.9%
4 Netherlands 20 5.5%
5 Canada 14 3.8%
6 Singapore 5 1.4%
7 Ireland 5 1.4%
8 Korea, Republic of 4 1.1%
9 Uzbekistan 2 0.5%
10 Japan 2 0.5%
11 France 2 0.5%
12 Switzerland 2 0.5%
13 Ukraine 2 0.5%