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 54 59.3%
2 United States 13 14.3%
3 Germany 8 8.8%
4 Korea, Republic of 6 6.6%
5 Singapore 3 3.3%
6 Netherlands 2 2.2%
7 Russia 1 1.1%
8 Bangladesh 1 1.1%
9 Canada 1 1.1%
10 Latvia 1 1.1%
11 Turkey 1 1.1%