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 41.3%
2 United States 28 30.4%
3 Netherlands 10 10.9%
4 Canada 5 5.4%
5 Germany 4 4.3%
6 Hong Kong 3 3.3%
7 Korea, Republic of 2 2.2%
8 Czech Republic 2 2.2%