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 China 18 38.3%
2 United States 16 34%
3 Canada 3 6.4%
4 Taiwan 3 6.4%
5 Germany 3 6.4%
6 Hong Kong 1 2.1%
7 Singapore 1 2.1%
8 Switzerland 1 2.1%
9 United Kingdom 1 2.1%