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 40 47.1%
2 United States 22 25.9%
3 Germany 7 8.2%
4 Iran, Islamic Republic of 5 5.9%
5 Taiwan 4 4.7%
6 Hong Kong 4 4.7%
7 Czech Republic 1 1.2%
8 Portugal 1 1.2%
9 Russia 1 1.2%