BPG致力于知识的发现和传播
Total Visits of This Article
2019 | 总访问次数
排名 国家/地区 数量 占比
1 67 75.3%
2 United States 9 10.1%
3 China 4 4.5%
4 Germany 2 2.2%
5 Korea, Republic of 2 2.2%
6 Singapore 1 1.1%
7 Taiwan 1 1.1%
8 Australia 1 1.1%
9 Hong Kong 1 1.1%
10 Japan 1 1.1%