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 129 43.7%
2 United States 94 31.9%
3 Germany 37 12.5%
4 Netherlands 10 3.4%
5 Hong Kong 9 3.1%
6 Japan 3 1%
7 Russia 3 1%
8 Korea, Republic of 2 0.7%
9 Australia 2 0.7%
10 United Kingdom 2 0.7%
11 Singapore 1 0.3%
12 Spain 1 0.3%
13 Sweden 1 0.3%
14 Taiwan 1 0.3%