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 57.9%
2 United States 53 19.1%
3 Germany 34 12.2%
4 Netherlands 21 7.6%
5 Singapore 3 1.1%
6 Switzerland 2 0.7%
7 France 2 0.7%
8 Russia 1 0.4%
9 United Arab Emirates 1 0.4%