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 29 34.9%
2 United States 16 19.3%
3 Netherlands 15 18.1%
4 Germany 11 13.3%
5 Russia 3 3.6%
6 United Kingdom 2 2.4%
7 Australia 2 2.4%
8 Italy 2 2.4%
9 Canada 1 1.2%
10 Hong Kong 1 1.2%
11 Norway 1 1.2%