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 34 37.8%
2 China 32 35.6%
3 Germany 8 8.9%
4 Netherlands 6 6.7%
5 Hong Kong 3 3.3%
6 Taiwan 3 3.3%
7 United Kingdom 1 1.1%
8 Canada 1 1.1%
9 Portugal 1 1.1%
10 Sweden 1 1.1%