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 178 60.1%
2 United States 49 16.6%
3 Germany 35 11.8%
4 Netherlands 13 4.4%
5 Canada 13 4.4%
6 Singapore 3 1%
7 United Kingdom 2 0.7%
8 Russia 2 0.7%
9 Ireland 1 0.3%