废寝忘食的英文：
[Literal Meaning]
stop/sleep/forget/meal
to disregard meal times and go without sleep

[解释]
专心努力地做一件事。

[Explanation]
to concentrate on something completely

[例子]
这些年轻的讲师们为了早日能够晋升为副教授废寝忘食地工作。

[Example]
The young lecturers worked exhaustively in the hope of being promoted as associate professors soon.

[英语等价词]
to work like a horse

Swordsmen novels can make me read day and night with no thought for eating or sleeping.
武侠小说可以让我看得废寝忘食。