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 United States 52 34.9%
2 China 48 32.2%
3 Germany 15 10.1%
4 Netherlands 12 8.1%
5 Hong Kong 5 3.4%
6 Iran, Islamic Republic of 3 2%
7 France 3 2%
8 Taiwan 3 2%
9 United Kingdom 2 1.3%
10 2 1.3%
11 Canada 2 1.3%
12 Portugal 1 0.7%
13 Russia 1 0.7%