the coast is clear there is no danger of being observed or caught.
☞ The coast is clear originally meant that there were no enemies guarding a sea coast who would prevent an attempt to land or embark.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。