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 53 36.8%
2 United States 43 29.9%
3 Germany 16 11.1%
4 Hong Kong 8 5.6%
5 Netherlands 7 4.9%
6 Canada 4 2.8%
7 Korea, Republic of 4 2.8%
8 Switzerland 2 1.4%
9 Norway 2 1.4%
10 Spain 2 1.4%
11 Japan 2 1.4%
12 Sweden 1 0.7%