BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 United States 63 40.9%
2 China 40 26%
3 Germany 14 9.1%
4 Netherlands 8 5.2%
5 Taiwan 8 5.2%
6 Hong Kong 6 3.9%
7 Canada 5 3.2%
8 Czech Republic 3 1.9%
9 Japan 2 1.3%
10 Malaysia 2 1.3%
11 1 0.6%
12 Ukraine 1 0.6%
13 Portugal 1 0.6%