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 76 38.8%
2 United States 59 30.1%
3 Netherlands 19 9.7%
4 Korea, Republic of 10 5.1%
5 Germany 8 4.1%
6 Ghana 7 3.6%
7 Poland 4 2%
8 Norway 3 1.5%
9 Belgium 2 1%
10 Canada 2 1%
11 India 2 1%
12 Japan 2 1%
13 Russia 1 0.5%
14 Sweden 1 0.5%