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 47 46.5%
2 United States 22 21.8%
3 Germany 19 18.8%
4 Hong Kong 3 3%
5 Czech Republic 2 2%
6 Taiwan 2 2%
7 United Kingdom 2 2%
8 Canada 1 1%
9 Ukraine 1 1%
10 Japan 1 1%
11 Portugal 1 1%