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 39 45.9%
2 United States 14 16.5%
3 10 11.8%
4 Netherlands 8 9.4%
5 Russia 3 3.5%
6 France 3 3.5%
7 Malaysia 3 3.5%
8 Iran, Islamic Republic of 2 2.4%
9 Korea, Republic of 1 1.2%
10 Germany 1 1.2%
11 Canada 1 1.2%