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 51 51%
2 United States 14 14%
3 Netherlands 13 13%
4 Germany 7 7%
5 Russia 5 5%
6 Canada 4 4%
7 Brazil 2 2%
8 Norway 2 2%
9 United Kingdom 1 1%
10 Moldova, Republic of 1 1%