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 20 43.5%
2 United States 10 21.7%
3 Switzerland 4 8.7%
4 Netherlands 3 6.5%
5 Japan 2 4.3%
6 United Kingdom 1 2.2%
7 Spain 1 2.2%
8 Australia 1 2.2%
9 Canada 1 2.2%
10 Czech Republic 1 2.2%
11 Finland 1 2.2%
12 France 1 2.2%