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
1 889 84.2%
2 United States 72 6.8%
3 China 51 4.8%
4 Germany 21 2%
5 France 11 1%
6 Norway 3 0.3%
7 Czech Republic 2 0.2%
8 Canada 2 0.2%
9 United Kingdom 2 0.2%
10 Taiwan 1 0.1%
11 India 1 0.1%
12 Netherlands 1 0.1%