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 52.7%
2 United States 22 23.7%
3 Netherlands 9 9.7%
4 France 7 7.5%
5 Singapore 2 2.2%
6 United Arab Emirates 1 1.1%
7 Russia 1 1.1%
8 Germany 1 1.1%
9 Korea, Republic of 1 1.1%