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 226 59.5%
2 United States 75 19.7%
3 Germany 48 12.6%
4 Hong Kong 8 2.1%
5 Sweden 4 1.1%
6 Italy 3 0.8%
7 Korea, Republic of 3 0.8%
8 Viet Nam 3 0.8%
9 Mexico 2 0.5%
10 Netherlands 2 0.5%
11 Portugal 2 0.5%
12 Canada 2 0.5%
13 Finland 2 0.5%