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 249 30.1%
2 United States 226 27.3%
3 Finland 182 22%
4 Germany 80 9.7%
5 Canada 59 7.1%
6 Brazil 5 0.6%
7 Russia 4 0.5%
8 Iran, Islamic Republic of 3 0.4%
9 Netherlands 3 0.4%
10 Nigeria 2 0.2%
11 Belgium 2 0.2%
12 2 0.2%
13 Australia 2 0.2%
14 Hong Kong 2 0.2%
15 France 2 0.2%
16 Austria 1 0.1%
17 Latvia 1 0.1%
18 Moldova, Republic of 1 0.1%
19 Singapore 1 0.1%