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 139 45.6%
2 United States 54 17.7%
3 Germany 40 13.1%
4 Canada 37 12.1%
5 Switzerland 6 2%
6 Taiwan 4 1.3%
7 Japan 4 1.3%
8 New Zealand 4 1.3%
9 Philippines 3 1%
10 Russia 3 1%
11 Australia 2 0.7%
12 Bulgaria 2 0.7%
13 Ukraine 2 0.7%
14 United Kingdom 1 0.3%
15 Hong Kong 1 0.3%
16 India 1 0.3%
17 Czech Republic 1 0.3%
18 Singapore 1 0.3%