BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 23 41.8%
2 China 14 25.5%
3 Germany 6 10.9%
4 France 4 7.3%
5 Canada 3 5.5%
6 United Kingdom 2 3.6%
7 Moldova, Republic of 1 1.8%
8 Russia 1 1.8%
9 Estonia 1 1.8%