firm up (firmer,firmest)

• 1.  

  PHRASAL VERB（动词词组） If you firm up something or if it firms up, it becomes firmer and more solid. 使变结实; 变结实

  例：

  This treatment helps tone the body, firm up muscles and tighten the skin.

  这种治疗可以帮助保持体态，使肌肉变结实、皮肤紧致。

• 2.  

  PHRASAL VERB（动词词组） If you firm something up or if it firms up, it becomes clearer, stronger, or more definite. 使变明确; 变明确

  例：

  We can give you more detail as our plans firm up.

  等我们的计划明确时，我们可以给你更多细节。