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 100 62.1%
2 United States 21 13%
3 Netherlands 12 7.5%
4 Germany 7 4.3%
5 Korea, Republic of 6 3.7%
6 Canada 5 3.1%
7 France 5 3.1%
8 Hong Kong 3 1.9%
9 Switzerland 1 0.6%
10 Taiwan 1 0.6%