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 143 62.4%
2 United States 33 14.4%
3 Germany 30 13.1%
4 Taiwan 8 3.5%
5 Canada 6 2.6%
6 Russia 3 1.3%
7 Spain 2 0.9%
8 Hong Kong 2 0.9%
9 Netherlands 1 0.4%
10 Australia 1 0.4%