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 144 62.3%
2 United States 41 17.7%
3 Germany 32 13.9%
4 Netherlands 6 2.6%
5 Russia 2 0.9%
6 Australia 2 0.9%
7 Switzerland 2 0.9%
8 Singapore 1 0.4%
9 Moldova, Republic of 1 0.4%