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 252 52.9%
2 United States 142 29.8%
3 Germany 37 7.8%
4 Hong Kong 18 3.8%
5 Taiwan 13 2.7%
6 Russia 3 0.6%
7 Canada 2 0.4%
8 Japan 2 0.4%
9 Ukraine 2 0.4%
10 United Kingdom 2 0.4%
11 Korea, Republic of 1 0.2%
12 Brazil 1 0.2%
13 Singapore 1 0.2%