firing on all (four) cylinders working or functioning at a peak level.
☞ This expression is a metaphor from an internal-combustion engine: a cylinder is said to be firing when the fuel inside it is ignited.
2004Natural Health Winter bugs usually strike when it's least convenient, so ensuring your immune system is firing on all cylinders is essential.
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。