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 52 25%
2 China 44 21.2%
3 Germany 36 17.3%
4 Netherlands 19 9.1%
5 Sweden 14 6.7%
6 Russia 9 4.3%
7 Brazil 8 3.8%
8 United Kingdom 7 3.4%
9 India 4 1.9%
10 Japan 3 1.4%
11 Korea, Republic of 3 1.4%
12 Australia 2 1%
13 Hong Kong 2 1%
14 Singapore 2 1%
15 Syrian Arab Republic 2 1%
16 Israel 1 0.5%