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 417 56.8%
2 United States 132 18%
3 Netherlands 74 10.1%
4 Germany 62 8.4%
5 Canada 17 2.3%
6 Japan 5 0.7%
7 Ukraine 5 0.7%
8 Korea, Republic of 4 0.5%
9 France 4 0.5%
10 Finland 3 0.4%
11 Norway 3 0.4%
12 Singapore 3 0.4%
13 Switzerland 1 0.1%
14 Russia 1 0.1%
15 Albania 1 0.1%
16 Brazil 1 0.1%
17 India 1 0.1%