BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 35 36.5%
2 United States 21 21.9%
3 Germany 19 19.8%
4 Netherlands 9 9.4%
5 France 7 7.3%
6 Canada 2 2.1%
7 Czech Republic 1 1%
8 Sweden 1 1%
9 Korea, Republic of 1 1%