BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 41 41%
2 China 28 28%
3 Netherlands 12 12%
4 Germany 7 7%
5 Taiwan 4 4%
6 Hong Kong 3 3%
7 Korea, Republic of 1 1%
8 United Kingdom 1 1%
9 Portugal 1 1%
10 Sweden 1 1%
11 Viet Nam 1 1%