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 10 25.6%
2 China 7 17.9%
3 Canada 6 15.4%
4 Sweden 5 12.8%
5 Netherlands 4 10.3%
6 Germany 3 7.7%
7 Switzerland 2 5.1%
8 Hong Kong 1 2.6%
9 Japan 1 2.6%