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 36 35.3%
2 China 19 18.6%
3 Netherlands 16 15.7%
4 Germany 13 12.7%
5 France 8 7.8%
6 Hong Kong 5 4.9%
7 Czech Republic 2 2%
8 Canada 1 1%
9 Norway 1 1%
10 Viet Nam 1 1%