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 49 49.5%
2 Netherlands 18 18.2%
3 United States 18 18.2%
4 Germany 4 4%
5 Canada 3 3%
6 Malaysia 3 3%
7 Czech Republic 2 2%
8 France 1 1%
9 Iran, Islamic Republic of 1 1%