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 161 63.9%
2 United States 36 14.3%
3 Germany 34 13.5%
4 Hong Kong 5 2%
5 Russia 4 1.6%
6 Sweden 3 1.2%
7 Taiwan 3 1.2%
8 Canada 3 1.2%
9 Korea, Republic of 2 0.8%
10 Moldova, Republic of 1 0.4%