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 171 58.6%
2 United States 54 18.5%
3 Germany 47 16.1%
4 Korea, Republic of 6 2.1%
5 Hong Kong 4 1.4%
6 Saudi Arabia 3 1%
7 Singapore 2 0.7%
8 Ukraine 2 0.7%
9 Netherlands 1 0.3%
10 Russia 1 0.3%
11 Ireland 1 0.3%