忙於 (工作等)；深陷 (債務、麻煩事等)。
例句：
- Half the people in my office called in sick, so I was up to my ears! (我辦公室裡有一半的人請病假，所以我忙死了!)
- Sam's up to his eyes in debt. (山姆債臺高築)
- The mayor's up to his eyeballs in trouble. (市長身處困境中)
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