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 195 68.4%
2 Germany 42 14.7%
3 United States 31 10.9%
4 Singapore 3 1.1%
5 Ukraine 3 1.1%
6 Russia 3 1.1%
7 Canada 2 0.7%
8 Saudi Arabia 1 0.4%
9 France 1 0.4%
10 India 1 0.4%
11 Ireland 1 0.4%
12 Japan 1 0.4%
13 Poland 1 0.4%