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 135 52.5%
2 United States 40 15.6%
3 Germany 39 15.2%
4 Netherlands 27 10.5%
5 Hong Kong 6 2.3%
6 Indonesia 2 0.8%
7 Japan 2 0.8%
8 Canada 2 0.8%
9 Australia 1 0.4%
10 Switzerland 1 0.4%
11 Korea, Republic of 1 0.4%
12 Malaysia 1 0.4%