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 United States 246 50.6%
2 China 163 33.5%
3 Germany 27 5.6%
4 Canada 22 4.5%
5 Hong Kong 11 2.3%
6 Netherlands 6 1.2%
7 Taiwan 3 0.6%
8 Switzerland 2 0.4%
9 2 0.4%
10 Macao 2 0.4%
11 Australia 1 0.2%
12 Singapore 1 0.2%