1 埋头于
be up to your eyeballs in be up to your eyebrows in be up to your eyes in
2 深陷于
immerse be up to your neck in be up to your eyeballs in be up to your eyebrows in be up to your eyes in
3 忙于
occupied at engage occupy busy engaged about be up to your eyeballs in be up to your eyebrows in be up to your eyes in beaver away at beaver away be employed in doing get up to