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 38 40.4%
2 United States 25 26.6%
3 Netherlands 16 17%
4 Korea, Republic of 7 7.4%
5 Canada 3 3.2%
6 United Arab Emirates 2 2.1%
7 Singapore 1 1.1%
8 Czech Republic 1 1.1%
9 France 1 1.1%