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 United States 35 30.7%
2 China 30 26.3%
3 Netherlands 16 14%
4 Germany 9 7.9%
5 Canada 9 7.9%
6 Kazakhstan 5 4.4%
7 Russia 5 4.4%
8 Italy 2 1.8%
9 Malaysia 1 0.9%
10 Switzerland 1 0.9%
11 New Zealand 1 0.9%