eat up1. 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 out1. 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。