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 121 62.1%
2 China 43 22.1%
3 Germany 12 6.2%
4 France 9 4.6%
5 Hong Kong 5 2.6%
6 Italy 2 1%
7 Moldova, Republic of 1 0.5%
8 Netherlands 1 0.5%
9 United Kingdom 1 0.5%