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 United States 27 33.8%
2 China 19 23.8%
3 Netherlands 13 16.2%
4 Canada 11 13.8%
5 Germany 5 6.2%
6 Hong Kong 1 1.2%
7 Korea, Republic of 1 1.2%
8 Portugal 1 1.2%
9 Russia 1 1.2%
10 Taiwan 1 1.2%