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 136 43.5%
2 United States 102 32.6%
3 Germany 28 8.9%
4 Canada 24 7.7%
5 Taiwan 6 1.9%
6 United Kingdom 4 1.3%
7 Netherlands 4 1.3%
8 France 3 1%
9 Brazil 2 0.6%
10 Singapore 2 0.6%
11 Korea, Republic of 2 0.6%