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 China 40 33.6%
2 United States 28 23.5%
3 Netherlands 21 17.6%
4 Germany 13 10.9%
5 Canada 5 4.2%
6 Hong Kong 3 2.5%
7 Korea, Republic of 2 1.7%
8 Czech Republic 2 1.7%
9 Taiwan 2 1.7%
10 Ukraine 1 0.8%
11 United Kingdom 1 0.8%
12 Portugal 1 0.8%