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 United States 61 47.3%
2 Netherlands 29 22.5%
3 China 13 10.1%
4 Germany 7 5.4%
5 Korea, Republic of 6 4.7%
6 Sweden 4 3.1%
7 Taiwan 3 2.3%
8 France 2 1.6%
9 Canada 2 1.6%
10 Australia 1 0.8%
11 Singapore 1 0.8%