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 332 43%
2 United States 183 23.7%
3 Netherlands 123 15.9%
4 Germany 82 10.6%
5 Sweden 16 2.1%
6 Canada 15 1.9%
7 France 7 0.9%
8 India 3 0.4%
9 Korea, Republic of 2 0.3%
10 Hong Kong 2 0.3%
11 Finland 2 0.3%
12 Taiwan 2 0.3%
13 Ukraine 2 0.3%
14 Norway 1 0.1%