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 34 42.5%
2 United States 15 18.8%
3 Netherlands 13 16.2%
4 Venezuela, Bolivarian Republic of 4 5%
5 Taiwan 3 3.8%
6 Germany 3 3.8%
7 Singapore 2 2.5%
8 Austria 2 2.5%
9 Bulgaria 1 1.2%
10 Canada 1 1.2%
11 India 1 1.2%
12 Korea, Republic of 1 1.2%