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 239 77.6%
2 United States 31 10.1%
3 Germany 19 6.2%
4 Netherlands 4 1.3%
5 Russia 3 1%
6 Singapore 3 1%
7 Malaysia 3 1%
8 Australia 2 0.6%
9 United Kingdom 2 0.6%
10 Saudi Arabia 1 0.3%
11 Canada 1 0.3%