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 159 52.1%
2 United States 84 27.5%
3 Germany 40 13.1%
4 Hong Kong 7 2.3%
5 Canada 6 2%
6 Slovakia 3 1%
7 Australia 2 0.7%
8 Brazil 1 0.3%
9 Japan 1 0.3%
10 Netherlands 1 0.3%
11 Singapore 1 0.3%