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 143 58.1%
2 United States 47 19.1%
3 Germany 31 12.6%
4 Canada 9 3.7%
5 United Kingdom 4 1.6%
6 Taiwan 3 1.2%
7 Hong Kong 2 0.8%
8 Switzerland 2 0.8%
9 France 2 0.8%
10 Brazil 2 0.8%
11 Bulgaria 1 0.4%