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 123 63.1%
2 United States 33 16.9%
3 Germany 25 12.8%
4 Korea, Republic of 3 1.5%
5 Malaysia 2 1%
6 Netherlands 2 1%
7 Hong Kong 2 1%
8 Singapore 2 1%
9 Bulgaria 1 0.5%
10 Canada 1 0.5%
11 Russia 1 0.5%