firmed up是firm up的过去式

firm up

美

英

第三人称单数：firms up 现在分词：firming up 过去式：firmed up

英英

na.	1. to become more definite, or to make something more definite 2. to make the muscles in a part of your body stronger 3. to give someone or something what they need in order to be stronger

释义:

全部全部,坚俏坚俏

类别:全部全部,口语口语,书面语书面语,标题标题,技术技术

来源:全部全部,字典字典,网络网络

难度:全部全部,简单简单,中等中等,难难

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Eventually the ground firmed up enough for heavy equipment.