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 61.3%
2 United States 36 12.9%
3 Germany 33 11.8%
4 Canada 11 3.9%
5 Taiwan 7 2.5%
6 Netherlands 5 1.8%
7 Russia 4 1.4%
8 Singapore 2 0.7%
9 Sweden 2 0.7%
10 New Zealand 2 0.7%
11 Korea, Republic of 2 0.7%
12 Japan 1 0.4%
13 Ecuador 1 0.4%
14 Switzerland 1 0.4%
15 Spain 1 0.4%