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 240 60.5%
2 United States 69 17.4%
3 Germany 29 7.3%
4 Canada 18 4.5%
5 Italy 13 3.3%
6 Taiwan 12 3%
7 Hong Kong 9 2.3%
8 Singapore 2 0.5%
9 Switzerland 2 0.5%
10 France 2 0.5%
11 Australia 1 0.3%