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 653 81.1%
2 United States 53 6.6%
3 Germany 29 3.6%
4 Netherlands 23 2.9%
5 Canada 14 1.7%
6 Sweden 12 1.5%
7 Hong Kong 5 0.6%
8 Singapore 4 0.5%
9 Malaysia 3 0.4%
10 Russia 3 0.4%
11 Australia 3 0.4%
12 Austria 2 0.2%
13 Switzerland 1 0.1%