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 56 54.4%
2 United States 17 16.5%
3 Netherlands 15 14.6%
4 Germany 3 2.9%
5 Hong Kong 3 2.9%
6 Canada 3 2.9%
7 Singapore 2 1.9%
8 United Kingdom 1 1%
9 France 1 1%
10 Italy 1 1%
11 Korea, Republic of 1 1%