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 45 40.5%
2 China 33 29.7%
3 Netherlands 9 8.1%
4 Germany 7 6.3%
5 Hong Kong 7 6.3%
6 Taiwan 3 2.7%
7 Korea, Republic of 2 1.8%
8 2 1.8%
9 Canada 1 0.9%
10 Portugal 1 0.9%
11 Russia 1 0.9%