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 167 53.5%
2 United States 88 28.2%
3 Germany 45 14.4%
4 Japan 2 0.6%
5 Belarus 2 0.6%
6 Bolivia, Plurinational State of 2 0.6%
7 Singapore 2 0.6%
8 Sweden 2 0.6%
9 Canada 1 0.3%
10 Korea, Republic of 1 0.3%