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 165 55.6%
2 United States 54 18.2%
3 Germany 35 11.8%
4 Canada 19 6.4%
5 Taiwan 7 2.4%
6 Russia 5 1.7%
7 Sweden 3 1%
8 Korea, Republic of 2 0.7%
9 Mexico 2 0.7%
10 Netherlands 2 0.7%
11 United Kingdom 2 0.7%
12 Australia 1 0.3%