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 127 61.1%
2 United States 38 18.3%
3 Sweden 11 5.3%
4 Netherlands 9 4.3%
5 Russia 8 3.8%
6 Korea, Republic of 6 2.9%
7 Morocco 4 1.9%
8 Germany 3 1.4%
9 Ukraine 1 0.5%
10 Canada 1 0.5%