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 42 46.2%
2 United States 16 17.6%
3 Netherlands 11 12.1%
4 Japan 7 7.7%
5 Germany 5 5.5%
6 Malaysia 2 2.2%
7 Moldova, Republic of 2 2.2%
8 Spain 2 2.2%
9 Australia 2 2.2%
10 Taiwan 1 1.1%
11 Singapore 1 1.1%