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 30 33.3%
2 United States 18 20%
3 Germany 17 18.9%
4 Netherlands 11 12.2%
5 Singapore 4 4.4%
6 France 4 4.4%
7 Canada 2 2.2%
8 Czech Republic 1 1.1%
9 United Kingdom 1 1.1%
10 Hong Kong 1 1.1%
11 Korea, Republic of 1 1.1%