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 59.9%
2 United States 56 19.9%
3 Germany 43 15.2%
4 3 1.1%
5 France 2 0.7%
6 Hong Kong 2 0.7%
7 Switzerland 2 0.7%
8 Taiwan 2 0.7%
9 Kazakhstan 1 0.4%
10 Australia 1 0.4%
11 Canada 1 0.4%