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 45 48.9%
2 United States 27 29.3%
3 Germany 7 7.6%
4 Taiwan 6 6.5%
5 Hong Kong 3 3.3%
6 Portugal 1 1.1%
7 France 1 1.1%
8 Tanzania, United Republic of 1 1.1%
9 United Kingdom 1 1.1%