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 United States 24 61.5%
2 Germany 5 12.8%
3 Hong Kong 4 10.3%
4 Singapore 2 5.1%
5 Bolivia, Plurinational State of 2 5.1%
6 Canada 1 2.6%
7 China 1 2.6%