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 140 49.8%
2 United States 77 27.4%
3 Germany 37 13.2%
4 Canada 18 6.4%
5 Singapore 2 0.7%
6 Switzerland 2 0.7%
7 United Kingdom 2 0.7%
8 Australia 1 0.4%
9 Norway 1 0.4%
10 Russia 1 0.4%