1.look through 英[luk θru:] 美[l?k θru]
[词典] 看穿[识破]（某人或某事）; 仔细检查[审查]（某物）; 穿过…看; 对（某人）视而不见;
[网络] 浏览; 审核; 检查;
[例句]Peter starts looking through the mail as soon as the door shuts.
彼得一关上门就开始逐一查看起邮件来。
2.look at 英[luk ?t] 美[l?k ?t]
[词典] 看; 审视; 评判; 接受;
[例句]Can I have a look at that?
我能不能看一眼那个？
look through 重点在through，即为从头到尾的看，所以引申检查，浏览，look at 强调 看的