build/get/work up a head of steam
to get enough energy, support, or enthusiasm to do something effectively.
In the last three months the campaign has built up a good head of steam.
英语词组固定搭配大全包含18674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。