BPG致力于知识的发现和传播
Total Visits of This Article
2018 | 总访问次数
排名 国家/地区 数量 占比
1 United States 23 40.4%
2 Germany 12 21.1%
3 Netherlands 7 12.3%
4 China 6 10.5%
5 4 7%
6 Korea, Republic of 2 3.5%
7 France 1 1.8%
8 Republic of Korea 1 1.8%
9 United Kingdom 1 1.8%