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 218 87.2%
2 Germany 11 4.4%
3 United States 11 4.4%
4 Hong Kong 5 2%
5 Korea, Republic of 1 0.4%
6 Netherlands 1 0.4%
7 Singapore 1 0.4%
8 Switzerland 1 0.4%
9 Taiwan 1 0.4%