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 40.3%
2 Netherlands 12 16.7%
3 China 11 15.3%
4 Canada 9 12.5%
5 France 3 4.2%
6 Germany 3 4.2%
7 Taiwan 2 2.8%
8 Russia 1 1.4%
9 Iran, Islamic Republic of 1 1.4%
10 Korea, Republic of 1 1.4%