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 43 42.6%
2 United States 23 22.8%
3 Sweden 10 9.9%
4 Germany 7 6.9%
5 Netherlands 6 5.9%
6 Taiwan 4 4%
7 Hong Kong 3 3%
8 Singapore 2 2%
9 Japan 1 1%
10 Korea, Republic of 1 1%
11 Canada 1 1%