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 193 61.1%
2 United States 45 14.2%
3 Germany 33 10.4%
4 Netherlands 16 5.1%
5 France 12 3.8%
6 Canada 7 2.2%
7 Hong Kong 3 0.9%
8 Russia 3 0.9%
9 Switzerland 2 0.6%
10 United Kingdom 1 0.3%
11 Japan 1 0.3%