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 169 57.9%
2 United States 59 20.2%
3 Germany 36 12.3%
4 Canada 21 7.2%
5 Switzerland 2 0.7%
6 Hong Kong 1 0.3%
7 Moldova, Republic of 1 0.3%
8 Romania 1 0.3%
9 Russia 1 0.3%
10 Singapore 1 0.3%