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 199 70.1%
2 United States 39 13.7%
3 Germany 20 7%
4 Canada 11 3.9%
5 Singapore 5 1.8%
6 Korea, Republic of 4 1.4%
7 Indonesia 2 0.7%
8 United Kingdom 2 0.7%
9 Latvia 1 0.4%
10 Russia 1 0.4%