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 160 57.3%
2 United States 50 17.9%
3 Germany 29 10.4%
4 Canada 23 8.2%
5 Taiwan 4 1.4%
6 Iran, Islamic Republic of 3 1.1%
7 Japan 3 1.1%
8 Denmark 2 0.7%
9 Singapore 2 0.7%
10 Finland 1 0.4%
11 France 1 0.4%
12 Morocco 1 0.4%