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 74 46.5%
2 United States 25 15.7%
3 Netherlands 24 15.1%
4 Germany 13 8.2%
5 France 12 7.5%
6 Sweden 5 3.1%
7 Czech Republic 2 1.3%
8 Australia 1 0.6%
9 Canada 1 0.6%
10 Norway 1 0.6%
11 Switzerland 1 0.6%