eat up 1.吃完;吞噬 Eat up the dinner while it is still warm.趁饭还热,快把它吃完.2.消耗;用完 The work ate up all his time.那工作占用了他所有的时间.eat out 1.上馆子吃饭 They usually eat out on Sundays.星期天他们通常上馆子吃饭.2.锈坏;使腐烂 Rust had eaten out the gun barrel.枪筒已被锈蚀.不明白欢迎继续问我