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 79 53.7%
2 United States 31 21.1%
3 Germany 10 6.8%
4 Netherlands 9 6.1%
5 Japan 5 3.4%
6 Korea, Republic of 4 2.7%
7 India 3 2%
8 Italy 2 1.4%
9 France 2 1.4%
10 Czech Republic 1 0.7%
11 Sweden 1 0.7%