BPG致力于知识的发现和传播
Total Visits of This Article
2019 | 总访问次数
排名 国家/地区 数量 占比
1 603 81%
2 United States 59 7.9%
3 China 52 7%
4 Germany 13 1.7%
5 France 9 1.2%
6 Norway 2 0.3%
7 Switzerland 1 0.1%
8 Taiwan 1 0.1%
9 Ukraine 1 0.1%
10 United Kingdom 1 0.1%
11 Canada 1 0.1%
12 Japan 1 0.1%