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 32 39%
2 United States 22 26.8%
3 Germany 9 11%
4 Canada 5 6.1%
5 Nigeria 4 4.9%
6 Hong Kong 3 3.7%
7 Iran, Islamic Republic of 2 2.4%
8 Taiwan 2 2.4%
9 United Kingdom 1 1.2%
10 Portugal 1 1.2%
11 France 1 1.2%