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 216 71.5%
2 United States 33 10.9%
3 Germany 13 4.3%
4 Netherlands 9 3%
5 United Kingdom 6 2%
6 Hong Kong 4 1.3%
7 Iran, Islamic Republic of 4 1.3%
8 Estonia 3 1%
9 Russia 3 1%
10 Taiwan 2 0.7%
11 France 2 0.7%
12 Mexico 2 0.7%
13 Portugal 1 0.3%
14 Ukraine 1 0.3%
15 Singapore 1 0.3%
16 Spain 1 0.3%
17 Canada 1 0.3%