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 26 33.3%
2 United States 26 33.3%
3 Germany 10 12.8%
4 Netherlands 7 9%
5 Hong Kong 2 2.6%
6 Czech Republic 2 2.6%
7 France 2 2.6%
8 Norway 1 1.3%
9 United Kingdom 1 1.3%
10 Canada 1 1.3%