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 192 65.3%
2 United States 46 15.6%
3 Germany 28 9.5%
4 Canada 17 5.8%
5 Russia 3 1%
6 Singapore 2 0.7%
7 Sweden 2 0.7%
8 Switzerland 2 0.7%
9 Moldova, Republic of 1 0.3%
10 France 1 0.3%