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 20 33.3%
2 Germany 13 21.7%
3 China 12 20%
4 Netherlands 4 6.7%
5 Republic of Korea 2 3.3%
6 Canada 2 3.3%
7 Hong Kong 2 3.3%
8 Japan 1 1.7%
9 1 1.7%
10 Azerbaijan 1 1.7%
11 Singapore 1 1.7%
12 Switzerland 1 1.7%