| 单词 | on (或 upon) the lookout |
| 释义 | 警觉地注意着；留心守候着；费心寻觅着 He was on the lookout for a signal. If you're there during a peak-travel period, be on the lookout for thieves. Anything new or peculiar puts us upon the lookout to detect a possible absurdity. |
| 随便看 |
英汉双解词典包含548777条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。