BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 49 36.8%
2 United States 30 22.6%
3 Netherlands 20 15%
4 Germany 9 6.8%
5 Canada 8 6%
6 Russia 7 5.3%
7 Taiwan 4 3%
8 United Arab Emirates 2 1.5%
9 Sweden 2 1.5%
10 Czech Republic 1 0.8%
11 France 1 0.8%