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 33 33.7%
2 United States 21 21.4%
3 Germany 18 18.4%
4 Netherlands 15 15.3%
5 Hong Kong 3 3.1%
6 Canada 3 3.1%
7 Taiwan 3 3.1%
8 United Kingdom 1 1%
9 Portugal 1 1%