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 43 62.3%
2 China 7 10.1%
3 Hong Kong 6 8.7%
4 Canada 4 5.8%
5 Germany 3 4.3%
6 United Kingdom 2 2.9%
7 France 1 1.4%
8 Japan 1 1.4%
9 Moldova, Republic of 1 1.4%
10 Portugal 1 1.4%