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 37 37%
2 United States 23 23%
3 Netherlands 12 12%
4 Germany 9 9%
5 Czech Republic 5 5%
6 Korea, Republic of 4 4%
7 Hong Kong 3 3%
8 Portugal 2 2%
9 Russia 2 2%
10 United Kingdom 2 2%
11 Malaysia 1 1%