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 271 52.9%
2 United States 140 27.3%
3 Germany 39 7.6%
4 Canada 24 4.7%
5 Malaysia 16 3.1%
6 Netherlands 7 1.4%
7 Taiwan 4 0.8%
8 Singapore 3 0.6%
9 Luxembourg 2 0.4%
10 Russia 1 0.2%
11 Japan 1 0.2%
12 Australia 1 0.2%
13 Belarus 1 0.2%
14 Turkey 1 0.2%
15 Turkmenistan 1 0.2%