BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 321 45%
2 United States 158 22.2%
3 Netherlands 110 15.4%
4 Germany 67 9.4%
5 Canada 19 2.7%
6 Sweden 15 2.1%
7 France 6 0.8%
8 Iran, Islamic Republic of 4 0.6%
9 United Kingdom 3 0.4%
10 Russia 3 0.4%
11 Singapore 2 0.3%
12 India 2 0.3%
13 Sri Lanka 1 0.1%
14 Korea, Republic of 1 0.1%
15 Thailand 1 0.1%