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 281 54.1%
2 United States 157 30.3%
3 Germany 42 8.1%
4 Canada 16 3.1%
5 Taiwan 8 1.5%
6 Hong Kong 4 0.8%
7 Netherlands 3 0.6%
8 Belgium 3 0.6%
9 France 2 0.4%
10 Singapore 2 0.4%
11 South Africa 1 0.2%