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 161 57.9%
2 United States 56 20.1%
3 Germany 42 15.1%
4 Canada 8 2.9%
5 Poland 3 1.1%
6 Netherlands 2 0.7%
7 Nigeria 2 0.7%
8 Taiwan 1 0.4%
9 Ireland 1 0.4%
10 Israel 1 0.4%
11 Moldova, Republic of 1 0.4%