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 76 40%
2 United States 46 24.2%
3 Netherlands 20 10.5%
4 Taiwan 16 8.4%
5 Russia 10 5.3%
6 Hong Kong 7 3.7%
7 Germany 6 3.2%
8 Canada 5 2.6%
9 Switzerland 2 1.1%
10 1 0.5%
11 Australia 1 0.5%