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 110 57.9%
2 China 47 24.7%
3 Netherlands 16 8.4%
4 Germany 4 2.1%
5 Korea, Republic of 3 1.6%
6 Ghana 2 1.1%
7 Denmark 2 1.1%
8 Poland 2 1.1%
9 Russia 2 1.1%
10 Singapore 1 0.5%
11 Malaysia 1 0.5%