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 413 73.2%
2 United States 106 18.8%
3 Germany 21 3.7%
4 Russia 7 1.2%
5 Taiwan 5 0.9%
6 Korea, Republic of 3 0.5%
7 Hong Kong 2 0.4%
8 Singapore 2 0.4%
9 Hungary 1 0.2%
10 Japan 1 0.2%
11 Malaysia 1 0.2%
12 Netherlands 1 0.2%
13 Poland 1 0.2%