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 361 60.8%
2 United States 170 28.6%
3 Germany 33 5.6%
4 Russia 8 1.3%
5 Taiwan 7 1.2%
6 Australia 4 0.7%
7 Netherlands 3 0.5%
8 Norway 3 0.5%
9 Poland 2 0.3%
10 Sweden 2 0.3%
11 Estonia 1 0.2%