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 42 28.8%
2 United States 37 25.3%
3 Netherlands 20 13.7%
4 Canada 10 6.8%
5 Germany 9 6.2%
6 Korea, Republic of 8 5.5%
7 Italy 5 3.4%
8 Taiwan 5 3.4%
9 Australia 4 2.7%
10 Japan 2 1.4%
11 Kazakhstan 2 1.4%
12 Luxembourg 1 0.7%
13 Macao 1 0.7%