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 China 41 62.1%
2 United States 8 12.1%
3 Germany 6 9.1%
4 Netherlands 3 4.5%
5 Singapore 2 3%
6 Hong Kong 2 3%
7 Japan 1 1.5%
8 Korea, Republic of 1 1.5%
9 Australia 1 1.5%
10 Canada 1 1.5%