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 244 54.3%
2 United States 142 31.6%
3 Germany 38 8.5%
4 Taiwan 6 1.3%
5 Malaysia 5 1.1%
6 Canada 5 1.1%
7 Viet Nam 2 0.4%
8 Hong Kong 2 0.4%
9 France 2 0.4%
10 Iran, Islamic Republic of 1 0.2%
11 Singapore 1 0.2%
12 United Kingdom 1 0.2%