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 232 57%
2 United States 50 12.3%
3 Germany 44 10.8%
4 Netherlands 32 7.9%
5 Canada 29 7.1%
6 Sweden 10 2.5%
7 Japan 3 0.7%
8 Hong Kong 2 0.5%
9 India 2 0.5%
10 France 1 0.2%
11 Russia 1 0.2%
12 Switzerland 1 0.2%