BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 168 65.1%
2 United States 54 20.9%
3 Netherlands 11 4.3%
4 Germany 8 3.1%
5 Taiwan 7 2.7%
6 United Kingdom 3 1.2%
7 Hong Kong 3 1.2%
8 Iran, Islamic Republic of 1 0.4%
9 Portugal 1 0.4%
10 Russia 1 0.4%
11 Canada 1 0.4%