immerse in
1．involve deeply陷入；埋头于
He is immersed in the study of English．他潜心攻读英语。
Though they were immersed in difficultier，they were still in high spirits．虽然他们陷于重重困难， 但仍然情绪高涨。
He immersed himself in sorrow． 他陷于悲伤之中。
2．put under the surface of（water or other liquid）浸入
She immersed her head in the water.她把头浸入水中。