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 186 68.9%
2 Netherlands 24 8.9%
3 United States 24 8.9%
4 Germany 11 4.1%
5 Russia 9 3.3%
6 France 8 3%
7 Canada 3 1.1%
8 Iran, Islamic Republic of 2 0.7%
9 Korea, Republic of 1 0.4%
10 United Kingdom 1 0.4%
11 New Zealand 1 0.4%