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 China 13 27.1%
2 Germany 10 20.8%
3 United States 8 16.7%
4 Russia 4 8.3%
5 United Kingdom 4 8.3%
6 Hong Kong 3 6.2%
7 France 2 4.2%
8 Canada 2 4.2%
9 Spain 2 4.2%