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 140 42.7%
2 United States 134 40.9%
3 Germany 29 8.8%
4 Taiwan 8 2.4%
5 Hong Kong 4 1.2%
6 Japan 3 0.9%
7 Netherlands 2 0.6%
8 Poland 2 0.6%
9 Sweden 2 0.6%
10 Switzerland 2 0.6%
11 United Kingdom 2 0.6%