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 54 55.1%
2 United States 21 21.4%
3 Germany 7 7.1%
4 Netherlands 5 5.1%
5 Greece 3 3.1%
6 Australia 2 2%
7 Canada 2 2%
8 Korea, Republic of 1 1%
9 Russia 1 1%
10 Singapore 1 1%
11 Taiwan 1 1%