app (我怕) + rent (租借) + ice (冷) = 上技校的时候，到了快毕业的时候，就把学生租出去，给电子厂打工 = 当学徒
An apprentice is a young person who works for someone in order to learn their skill. （学徒）
He left school at 15 and trained as an apprentice carpenter.他15岁辍学，当上木工学徒。
If a young person is apprenticed to someone, they go to work for them in order to learn their skills.
I was apprenticed to a builder when I was fourteen. 14岁时，我拜一个建筑工人为师当学徒。