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 59 45%
2 United States 39 29.8%
3 Netherlands 10 7.6%
4 Germany 7 5.3%
5 Korea, Republic of 7 5.3%
6 Poland 2 1.5%
7 Russia 2 1.5%
8 Sweden 2 1.5%
9 Singapore 1 0.8%
10 Australia 1 0.8%
11 Canada 1 0.8%