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 39 38.6%
2 China 24 23.8%
3 Germany 10 9.9%
4 Netherlands 10 9.9%
5 Hong Kong 6 5.9%
6 Canada 4 4%
7 Taiwan 3 3%
8 Portugal 1 1%
9 Iran, Islamic Republic of 1 1%
10 Denmark 1 1%
11 France 1 1%
12 Viet Nam 1 1%