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 49 49.5%
2 United States 17 17.2%
3 Germany 14 14.1%
4 Canada 5 5.1%
5 Hong Kong 4 4%
6 Czech Republic 2 2%
7 Korea, Republic of 2 2%
8 Taiwan 2 2%
9 Ukraine 1 1%
10 Netherlands 1 1%
11 Portugal 1 1%
12 Ireland 1 1%