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 15 38.5%
2 China 9 23.1%
3 Netherlands 7 17.9%
4 Germany 3 7.7%
5 Hong Kong 1 2.6%
6 Japan 1 2.6%
7 Russia 1 2.6%
8 Switzerland 1 2.6%
9 Australia 1 2.6%