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 China 88 63.8%
2 United States 24 17.4%
3 Germany 14 10.1%
4 Hong Kong 3 2.2%
5 Canada 3 2.2%
6 France 2 1.4%
7 Korea, Republic of 1 0.7%
8 Portugal 1 0.7%
9 Russia 1 0.7%
10 Sweden 1 0.7%