eat away

1. 侵蝕
   Rust is eating away the iron hinge.

   鐵鏽正腐蝕著鐵鉸鏈。

2. 不停地吃
   They had been eating away for two hours.

   他們已經吃了兩個小時，還在吃。

eat into

1. 侵蝕
   The acid eats into metals quickly.

   酸腐蝕金屬很快。

2. 逐漸耗盡
   Her extravagance ate into her husband's inheritances.

   她揮霍無度，使她丈夫所得的遺產日益減少。

eat out

1. 上館子吃飯
   They usually eat out on Sundays.

   星期天他們通常上館子吃飯。

2. 鏽壞；使腐爛
   Rust had eaten out the gun barrel.

   槍筒已被鏽蝕。

eat up

1. 吃完；吞噬
   Eat up the dinner while it is still warm.

   趁飯還熱，快把它吃完。

2. 消耗；用完
   The work ate up all his time.

   那工作佔用了他所有的時間。

• eat one's heart out
  suffer from excessive longing for something unattainable.
• eat like a bird (or a horse)
  informal eat very little (or a lot).
• eat one's words
  retract what one has said, especially in a humiliated way.
• I'll eat my hat
  informal said to indicate that one thinks something is extremely unlikely to happen.
• what's eating you (or him etc.) ?
  informal what is worrying or annoying you?