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 165 50.3%
2 United States 104 31.7%
3 Germany 32 9.8%
4 United Kingdom 5 1.5%
5 Taiwan 4 1.2%
6 Sweden 4 1.2%
7 France 4 1.2%
8 Singapore 3 0.9%
9 Netherlands 2 0.6%
10 Switzerland 2 0.6%
11 Poland 1 0.3%
12 Russia 1 0.3%
13 Australia 1 0.3%