BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 68 45%
2 United States 40 26.5%
3 Netherlands 15 9.9%
4 Germany 8 5.3%
5 Korea, Republic of 5 3.3%
6 France 3 2%
7 Japan 3 2%
8 Canada 2 1.3%
9 Norway 2 1.3%
10 India 2 1.3%
11 Taiwan 2 1.3%
12 Sweden 1 0.7%