积留的英文：
entrapment

On the top of very high mountains snow persists throughout the year
高山之顶,雪积留全年。

To hinder,entrap,or entangle as if in mire.
使受困扰使阻碍、牵绊或纠缠如陷入泥沼一般。

Fresh snow is full of entrapped air.
刚下的雪饱含着空气。

Dirty steel due to entrapment of slag or pieces of refractory.
因夹杂炉渣或耐火材料颗粒而造成的不纯净钢。

entrapped by a skillful interviewer into making a damaging statement
为狡猾的提问人所诱导而发表的不利言论

A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.
气疱在成石过程中在火山岩中包含气体的一种小洞穴