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 China 36 40.4%
2 United States 22 24.7%
3 Germany 11 12.4%
4 Hong Kong 6 6.7%
5 Canada 6 6.7%
6 Taiwan 4 4.5%
7 Czech Republic 2 2.2%
8 Netherlands 1 1.1%
9 Portugal 1 1.1%