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 67%
2 United States 47 16.3%
3 Germany 30 10.4%
4 Netherlands 5 1.7%
5 Hong Kong 3 1%
6 Taiwan 3 1%
7 Canada 2 0.7%
8 Portugal 2 0.7%
9 Singapore 1 0.3%
10 Sweden 1 0.3%
11 France 1 0.3%