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 159 53.2%
2 United States 61 20.4%
3 Germany 30 10%
4 Netherlands 24 8%
5 Canada 14 4.7%
6 Russia 3 1%
7 Singapore 2 0.7%
8 Austria 2 0.7%
9 France 2 0.7%
10 Estonia 1 0.3%
11 Moldova, Republic of 1 0.3%