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 43.6%
2 China 18 19.1%
3 Netherlands 11 11.7%
4 Germany 9 9.6%
5 Canada 6 6.4%
6 Hong Kong 3 3.2%
7 Taiwan 3 3.2%
8 United Kingdom 1 1.1%
9 Portugal 1 1.1%
10 France 1 1.1%