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 167 58.6%
2 United States 58 20.4%
3 Germany 34 11.9%
4 Hong Kong 6 2.1%
5 Netherlands 4 1.4%
6 Ukraine 3 1.1%
7 Singapore 2 0.7%
8 Sweden 2 0.7%
9 Bulgaria 2 0.7%
10 Canada 2 0.7%
11 Russia 1 0.4%
12 Kazakhstan 1 0.4%
13 Korea, Republic of 1 0.4%
14 Taiwan 1 0.4%
15 Turkey 1 0.4%