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 44 38.9%
2 China 38 33.6%
3 Netherlands 14 12.4%
4 Germany 5 4.4%
5 Canada 5 4.4%
6 Hong Kong 3 2.7%
7 Czech Republic 1 0.9%
8 Russia 1 0.9%
9 Singapore 1 0.9%
10 Taiwan 1 0.9%