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 351 52.5%
2 United States 144 21.6%
3 Netherlands 76 11.4%
4 Germany 62 9.3%
5 Canada 13 1.9%
6 Russia 6 0.9%
7 France 3 0.4%
8 Japan 3 0.4%
9 Korea, Republic of 2 0.3%
10 India 2 0.3%
11 Singapore 2 0.3%
12 Ukraine 2 0.3%
13 United Kingdom 2 0.3%