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 36 44.4%
2 United States 16 19.8%
3 Netherlands 9 11.1%
4 Russia 7 8.6%
5 Korea, Republic of 7 8.6%
6 Germany 2 2.5%
7 Hong Kong 2 2.5%
8 France 1 1.2%
9 Canada 1 1.2%