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 254 54%
2 United States 142 30.2%
3 Germany 28 6%
4 Hong Kong 18 3.8%
5 Taiwan 11 2.3%
6 Russia 4 0.9%
7 Czech Republic 3 0.6%
8 Finland 2 0.4%
9 France 2 0.4%
10 Brazil 2 0.4%
11 United Kingdom 1 0.2%
12 Japan 1 0.2%
13 Philippines 1 0.2%
14 Romania 1 0.2%