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 United States 225 43.9%
2 China 217 42.3%
3 Germany 49 9.6%
4 Taiwan 5 1%
5 Russia 4 0.8%
6 Malaysia 3 0.6%
7 Singapore 2 0.4%
8 Australia 2 0.4%
9 Canada 2 0.4%
10 Romania 2 0.4%
11 Japan 1 0.2%
12 Netherlands 1 0.2%