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 41 41%
2 United States 19 19%
3 Germany 8 8%
4 Netherlands 8 8%
5 Hong Kong 5 5%
6 Norway 4 4%
7 Japan 4 4%
8 Taiwan 4 4%
9 United Kingdom 2 2%
10 Poland 2 2%
11 Iran, Islamic Republic of 2 2%
12 Singapore 1 1%