BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 69 41.1%
2 China 50 29.8%
3 Germany 23 13.7%
4 France 7 4.2%
5 Japan 5 3%
6 Korea, Republic of 4 2.4%
7 India 3 1.8%
8 Iran, Islamic Republic of 3 1.8%
9 Senegal 2 1.2%
10 Hong Kong 2 1.2%