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 110 39%
2 Sweden 85 30.1%
3 United States 45 16%
4 Germany 9 3.2%
5 Taiwan 8 2.8%
6 Korea, Republic of 7 2.5%
7 Netherlands 6 2.1%
8 Canada 4 1.4%
9 France 3 1.1%
10 Russia 2 0.7%
11 Moldova, Republic of 2 0.7%
12 Estonia 1 0.4%