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 483 52%
2 United States 231 24.9%
3 Netherlands 109 11.7%
4 Germany 68 7.3%
5 Canada 13 1.4%
6 Taiwan 7 0.8%
7 France 5 0.5%
8 United Kingdom 3 0.3%
9 Ukraine 2 0.2%
10 Norway 2 0.2%
11 India 2 0.2%
12 Korea, Republic of 1 0.1%
13 Moldova, Republic of 1 0.1%
14 Uzbekistan 1 0.1%