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 157 44%
2 United States 136 38.1%
3 Germany 36 10.1%
4 Taiwan 10 2.8%
5 Canada 5 1.4%
6 United Kingdom 3 0.8%
7 France 3 0.8%
8 Hong Kong 3 0.8%
9 Netherlands 2 0.6%
10 Russia 1 0.3%
11 Sweden 1 0.3%